HM400 AMW_Modcod table 10 rolloff.xlsx

XLSX spreadsheet 34 KB Posted Jul 23, 2025

Attached to: United States Army AISR Satellite Communications Services
Solicitation number: FA2541-25-012
Issued by: Department of the Air Force

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Written by GovTribe AI · Jul 23, 2025

The file is an Excel spreadsheet titled "HM400 AMW_Modcod table 10 rolloff.xlsx" containing a detailed technical table of Modulation and Coding (MODCOD) specifications for satellite communication systems. The spreadsheet provides comprehensive technical parameters for 87 different MODCOD configurations, including data rates ranging from 256 kbps to 68,812 kbps, with various modulation types (BPSK, QPSK, 8PSK), different Forward Error Correction (FEC) code rates (1/9 to 7/9), and spreading factors. Key technical specifications include symbol rates, chip rates, rolloff factors, occupied bandwidth, and signal-to-noise ratio measurements (Ec/No and Eb/No) with Packet Error Rate (PER) performance at 10^-5.

The document appears to be a proprietary Hughes technical specification, marked as containing ITAR-controlled technical data with access restrictions. The MODCOD table is version 4 and includes reference IDs from GA-ASI UK Protector and GA-ASI NGSO MODCODs, suggesting it is designed for specific satellite communication system implementations. The technical data includes implementation loss calculations and performance characteristics across different modulation and coding schemes, providing a comprehensive reference for satellite communication system design and performance evaluation.

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MODCODs

	Selected AMW MODCODs to Customer
	v1
	ID	Data Rate
(kbps)	Modulation	LDPC Code Rate	Spreading Factor	Symbol Rate (Msps)	Chip Rate (Mcps)	Rolloff Factor	Occupied BW
(MHz)	Ec/No (dB)
PER 10-5	Eb/No (dB)

PER 10-5

1	63	QPSK	1/9	1	0.320	0.320	0.1	0.352	-4.0	2.5
2	126	QPSK	2/9	1	0.320	0.320	0.1	0.352	-1.5	2.0
3	189	QPSK	1/3	1	0.320	0.320	0.1	0.352	0.5	2.3
4	253	QPSK	4/9	1	0.320	0.320	0.1	0.352	2.0	2.5
5	316	QPSK	5/9	1	0.320	0.320	0.1	0.352	3.3	2.8
6	379	QPSK	2/3	1	0.320	0.320	0.1	0.352	4.7	3.5
7	443	QPSK	7/9	1	0.320	0.320	0.1	0.352	6.1	4.2
8	480	8PSK	5/9	1	0.320	0.320	0.1	0.352	6.7	4.5
9	576	8PSK	2/3	1	0.320	0.320	0.1	0.352	7.4	4.4
10	672	8PSK	7/9	1	0.320	0.320	0.1	0.352	9.3	5.6
11	253	QPSK	1/9	1	1.280	1.280	0.1	1.408	-4.0	2.5
12	506	QPSK	2/9	1	1.280	1.280	0.1	1.408	-1.5	2.0
13	759	QPSK	1/3	1	1.280	1.280	0.1	1.408	0.5	2.3
14	1012	QPSK	4/9	1	1.280	1.280	0.1	1.408	2.0	2.5
15	1265	QPSK	5/9	1	1.280	1.280	0.1	1.408	3.3	2.8
16	1518	QPSK	2/3	1	1.280	1.280	0.1	1.408	4.7	3.5
17	1772	QPSK	7/9	1	1.280	1.280	0.1	1.408	6.1	4.2
18	1920	8PSK	5/9	1	1.280	1.280	0.1	1.408	6.7	4.5
19	2304	8PSK	2/3	1	1.280	1.280	0.1	1.408	7.4	4.4
20	2688	8PSK	7/9	1	1.280	1.280	0.1	1.408	9.3	5.6
21	848	QPSK	1/9	1	4.288	4.288	0.1	4.717	-4.0	2.5
22	1696	QPSK	2/9	1	4.288	4.288	0.1	4.717	-1.5	2.0
23	2544	QPSK	1/3	1	4.288	4.288	0.1	4.717	0.5	2.3
24	3392	QPSK	4/9	1	4.288	4.288	0.1	4.717	2.0	2.5
25	4240	QPSK	5/9	1	4.288	4.288	0.1	4.717	3.3	2.8
26	5088	QPSK	2/3	1	4.288	4.288	0.1	4.717	4.7	3.5
27	5936	QPSK	7/9	1	4.288	4.288	0.1	4.717	6.1	4.2
28	6432	8PSK	5/9	1	4.288	4.288	0.1	4.717	6.7	4.5
29	7718	8PSK	2/3	1	4.288	4.288	0.1	4.717	7.4	4.4
30	9004	8PSK	7/9	1	4.288	4.288	0.1	4.717	9.3	5.6
31	1620	QPSK	1/9	1	8.192	8.192	0.1	9.011	-4.0	2.5
32	3240	QPSK	2/9	1	8.192	8.192	0.1	9.011	-1.5	2.0
33	4860	QPSK	1/3	1	8.192	8.192	0.1	9.011	0.5	2.3
34	6480	QPSK	4/9	1	8.192	8.192	0.1	9.011	2.0	2.5
35	8100	QPSK	5/9	1	8.192	8.192	0.1	9.011	3.3	2.8
36	9721	QPSK	2/3	1	8.192	8.192	0.1	9.011	4.7	3.5
37	11341	QPSK	7/9	1	8.192	8.192	0.1	9.011	6.1	4.2
38	12288	8PSK	5/9	1	8.192	8.192	0.1	9.011	6.7	4.5
39	14745	8PSK	2/3	1	8.192	8.192	0.1	9.011	7.4	4.4
40	17203	8PSK	7/9	1	8.192	8.192	0.1	9.011	9.3	5.6
41	3240	QPSK	1/9	1	16.384	16.384	0.1	18.022	-4.0	2.5
42	6480	QPSK	2/9	1	16.384	16.384	0.1	18.022	-1.5	2.0
43	9721	QPSK	1/3	1	16.384	16.384	0.1	18.022	0.5	2.3
44	12961	QPSK	4/9	1	16.384	16.384	0.1	18.022	2.0	2.5
45	16201	QPSK	5/9	1	16.384	16.384	0.1	18.022	3.3	2.8
46	19442	QPSK	2/3	1	16.384	16.384	0.1	18.022	4.7	3.5
47	22682	QPSK	7/9	1	16.384	16.384	0.1	18.022	6.1	4.2
48	24576	8PSK	5/9	1	16.384	16.384	0.1	18.022	6.7	4.5
49	29491	8PSK	2/3	1	16.384	16.384	0.1	18.022	7.4	4.4
50	34406	8PSK	7/9	1	16.384	16.384	0.1	18.022	9.3	5.6
41	6480	QPSK	1/9	1	32.768	32.768	0.1	36.045	-4.0	2.5
42	12961	QPSK	2/9	1	32.768	32.768	0.1	36.045	-1.5	2.0
43	19442	QPSK	1/3	1	32.768	32.768	0.1	36.045	0.5	2.3
44	25923	QPSK	4/9	1	32.768	32.768	0.1	36.045	2.0	2.5
45	32403	QPSK	5/9	1	32.768	32.768	0.1	36.045	3.3	2.8
46	38884	QPSK	2/3	1	32.768	32.768	0.1	36.045	4.7	3.5
47	45365	QPSK	7/9	1	32.768	32.768	0.1	36.045	6.1	4.2
48	49152	8PSK	5/9	1	32.768	32.768	0.1	36.045	6.7	4.5
49	58982	8PSK	2/3	1	32.768	32.768	0.1	36.045	7.4	4.4
50	68812	8PSK	7/9	1	32.768	32.768	0.1	36.045	9.3	5.6
51	2050	QPSK	1/9	1	10.368	10.368	0.1	11.405	-4.0	2.5
52	4101	QPSK	2/9	1	10.368	10.368	0.1	11.405	-1.5	2.0
53	6151	QPSK	1/3	1	10.368	10.368	0.1	11.405	0.5	2.3
54	8202	QPSK	4/9	1	10.368	10.368	0.1	11.405	2.0	2.5
55	10252	QPSK	5/9	1	10.368	10.368	0.1	11.405	3.3	2.8
56	12303	QPSK	2/3	1	10.368	10.368	0.1	11.405	4.7	3.5
57	14353	QPSK	7/9	1	10.368	10.368	0.1	11.405	6.1	4.2
58	4493	QPSK	1/9	1	22.720	22.720	0.1	24.992	-4.0	2.5
59	8987	QPSK	2/9	1	22.720	22.720	0.1	24.992	-1.5	2.0
60	13480	QPSK	1/3	1	22.720	22.720	0.1	24.992	0.5	2.3
61	17974	QPSK	4/9	1	22.720	22.720	0.1	24.992	2.0	2.5
62	22467	QPSK	5/9	1	22.720	22.720	0.1	24.992	3.3	2.8
63	26961	QPSK	2/3	1	22.720	22.720	0.1	24.992	4.7	3.5
64	31454	QPSK	7/9	1	22.720	22.720	0.1	24.992	6.1	4.2
65	1746	QPSK	1/9	4	8.832	35.328	0.1	38.861	-10.0	2.6
66	3493	QPSK	2/9	4	8.832	35.328	0.1	38.861	-7.5	2.0
67	5240	QPSK	1/3	4	8.832	35.328	0.1	38.861	-5.5	2.3
68	6987	QPSK	4/9	4	8.832	35.328	0.1	38.861	-4.0	2.5
69	8733	QPSK	5/9	4	8.832	35.328	0.1	38.861	-2.7	2.9
70	10480	QPSK	2/3	4	8.832	35.328	0.1	38.861	-1.3	3.5
71	12227	QPSK	7/9	4	8.832	35.328	0.1	38.861	0.1	4.2
72	2354	QPSK	1/9	4	11.904	47.616	0.1	52.378	-10.0	2.6
73	4708	QPSK	2/9	4	11.904	47.616	0.1	52.378	-7.5	2.0
74	7063	QPSK	1/3	4	11.904	47.616	0.1	52.378	-5.5	2.3
75	9417	QPSK	4/9	4	11.904	47.616	0.1	52.378	-4.0	2.5
76	11771	QPSK	5/9	4	11.904	47.616	0.1	52.378	-2.7	2.9
77	14126	QPSK	2/3	4	11.904	47.616	0.1	52.378	-1.3	3.5
78	16480	QPSK	7/9	4	11.904	47.616	0.1	52.378	0.1	4.2
79	16138	QPSK	5/9	1	16.320	16.320	0.1	17.952	3.3	2.8
80	19366	QPSK	2/3	1	16.320	16.320	0.1	17.952	4.7	3.5
81	22594	QPSK	7/9	1	16.320	16.320	0.1	17.952	6.1	4.2
82	24480	8PSK	5/9	1	16.320	16.320	0.1	17.952	6.7	4.5
83	29376	8PSK	2/3	1	16.320	16.320	0.1	17.952	7.4	4.4
84	34272	8PSK	7/9	1	16.320	16.320	0.1	17.952	9.3	5.6
85	32340	QPSK	5/9	1	32.704	32.704	0.1	35.974	3.3	2.8
86	38808	QPSK	2/3	1	32.704	32.704	0.1	35.974	4.7	3.5
87	45276	QPSK	7/9	1	32.704	32.704	0.1	35.974	6.1	4.2
Notes:
1. Available FEC code rate: 1/9, 2/9, 1/3, 4/9, 5/9, 2/3 and 7/9.
2. Available rolloff factors: 0.05, 0.1, 0.15 and 0.2. Rolloff factor of 0.1 is used as an example in the MODCODs table.
3. Transponder bandwudths: 36 MHz or 72 MHz
4. Throughput: FL 40 Mbps, RL 20 Mbps

All MODCODs w Formula

HM 400 Data Rates and MODCODs, v4

MODCOD Table is the same as v3, 4/28/23 Added formula for data rate calculation

	ID	Ref ID-1	Ref ID-2	Data Rate
(kbps)	Calculated Data Rate
(kbps)	Modulation	Modulation in No of Bit per Symbol	Estimated Overhead	LDPC Code Rate	Spreading Factor	Symbol Rate (Msps)	Chip Rate (Mcps)	WGS Rolloff Factor	Occupied BW
(MHz)	Ec/No (dB)
PER 10-5 or less	Ebi/No (dB)

PER 10-5 or less

1	4		256	ERROR:#REF!	BPSK	1	ERROR:#REF!	1/9	1	2.56	2.56	0.2	3.072	-7.2	2.3
2	14		256	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	1	0.64	0.64	0.2	0.768	-1.5	2.0
3	27	1	256	ERROR:#REF!	QPSK	2	ERROR:#REF!	1/9	1	1.28	1.28	0.2	1.536	-4.0	2.5
4	90	9	256	ERROR:#REF!	BPSK	1	ERROR:#REF!	1/9	4	2.56	10.24	0.2	12.288	-13.2	2.4
5	28	2	512	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	1	1.28	1.28	0.2	1.536	-1.5	2.0
6	41		512	ERROR:#REF!	QPSK	2	ERROR:#REF!	1/9	1	2.56	2.56	0.2	3.072	-4.0	2.5
7	30	3	1024	ERROR:#REF!	QPSK	2	ERROR:#REF!	4/9	1	1.28	1.28	0.2	1.536	2.0	2.5
8	42		1024	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	1	2.56	2.56	0.2	3.072	-1.5	2.0
9	62		1600	ERROR:#REF!	QPSK	2	ERROR:#REF!	1/9	1	8.192	8.192	0.2	9.8304	-4.0	2.5
10	44		2048	ERROR:#REF!	QPSK	2	ERROR:#REF!	4/9	1	2.56	2.56	0.2	3.072	2.0	2.5
11	56	4	2048	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	1	5.12	5.12	0.2	6.144	-1.5	2.0
12	46		3072	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/3	1	2.56	2.56	0.2	3.072	4.7	3.5
13	63	6	3200	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	1	8.192	8.192	0.2	9.8304	-1.5	2.0
14	93		3200	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	4	8.192	32.768	0.2	39.3216	-7.2	2.3
15	58		4096	ERROR:#REF!	QPSK	2	ERROR:#REF!	4/9	1	5.12	5.12	0.2	6.144	2.0	2.5
16	60		6144	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/3	1	5.12	5.12	0.2	6.144	4.7	3.5
17	65	7	6400	ERROR:#REF!	QPSK	2	ERROR:#REF!	4/9	1	8.192	8.192	0.2	9.8304	2.0	2.5
18	67	8	9600	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/3	1	8.192	8.192	0.2	9.8304	4.7	3.5
19	68		11200	ERROR:#REF!	QPSK	2	ERROR:#REF!	7/9	1	8.192	8.192	0.2	9.8304	6.1	4.2
20	79	10	12800	ERROR:#REF!	QPSK	2	ERROR:#REF!	4/9	1	16.384	16.384	0.2	19.6608	2.0	2.5
21	81		19200	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/3	1	16.384	16.384	0.2	19.6608	4.7	3.5
22	89		45000	ERROR:#REF!	QPSK	2	ERROR:#REF!	7/9	1	32.768	32.768	0.2	39.3216	6.1	4.2
23		5	2048	ERROR:#REF!	QPSK	2	ERROR:#REF!	2/9	4	5.12	20.48	0.2	24.576	-7.2	2.3
24		11	256	ERROR:#REF!	QPSK	2	ERROR:#REF!	1/9	23	1.28	29.44	0.2	35.328	-17.6	2.5
25			4800	ERROR:#REF!	QPSK	2	ERROR:#REF!	1/3	1	8.192	8.192	0.2	9.8304	0.5	2.3
26			8000	ERROR:#REF!	QPSK	2	ERROR:#REF!	5/9	1	8.192	8.192	0.2	9.8304	3.3	2.8
Notes:
1. Ref ID-1: GA-ASI UK Protector MODCOD Reference ID
2. Ref ID-2: GA-ASI NGSO MODCODs Reference ID
3. ID 25 and ID 26 are added to HM System for FEC rate 1/3 and 5/9

HUGHES PROPRIETARY

This document contains ITAR-controlled technical data. Access restricted.

HUGHES PROPRIETARY

All MODCODs

HM 400 Data Rates and MODCODs, v4

MODCOD Table is the same as v3

	ID	Ref ID-1	Ref ID-2	Data Rate
(kbps)	Modulation	LDPC Code Rate	Spreading Factor	Symbol Rate (Msps)	Chip Rate (Mcps)	WGS Rolloff Factor	Occupied BW
(MHz)	Ec/No (dB)
PER 10-5 or less	Ebi/No (dB)

PER 10-5 or less

1	4		256	BPSK	1/9	1	2.56	2.56	0.2	3.072	-7.2	2.3
2	14		256	QPSK	2/9	1	0.64	0.64	0.2	0.768	-1.5	2.0
3	27	1	256	QPSK	1/9	1	1.28	1.28	0.2	1.536	-4.0	2.5
4	90	9	256	BPSK	1/9	4	2.56	10.24	0.2	12.288	-13.2	2.3
5	28	2	512	QPSK	2/9	1	1.28	1.28	0.2	1.536	-1.5	2.0
6	41		512	QPSK	1/9	1	2.56	2.56	0.2	3.072	-4.0	2.5
7	30	3	1024	QPSK	4/9	1	1.28	1.28	0.2	1.536	2.0	2.5
8	42		1024	QPSK	2/9	1	2.56	2.56	0.2	3.072	-1.5	2.0
9	62		1600	QPSK	1/9	1	8.192	8.192	0.2	9.8304	-4.0	2.5
10	44		2048	QPSK	4/9	1	2.56	2.56	0.2	3.072	2.0	2.5
11	56	4	2048	QPSK	2/9	1	5.12	5.12	0.2	6.144	-1.5	2.0
12	46		3072	QPSK	2/3	1	2.56	2.56	0.2	3.072	4.7	3.5
13	63	6	3200	QPSK	2/9	1	8.192	8.192	0.2	9.8304	-1.5	2.0
14	93		3200	QPSK	2/9	4	8.192	32.768	0.2	39.3216	-7.2	2.3
15	58		4096	QPSK	4/9	1	5.12	5.12	0.2	6.144	2.0	2.5
16	60		6144	QPSK	2/3	1	5.12	5.12	0.2	6.144	4.7	3.5
17	65	7	6400	QPSK	4/9	1	8.192	8.192	0.2	9.8304	2.0	2.5
18	67	8	9600	QPSK	2/3	1	8.192	8.192	0.2	9.8304	4.7	3.5
19	68		11200	QPSK	7/9	1	8.192	8.192	0.2	9.8304	6.1	4.2
20	79	10	12800	QPSK	4/9	1	16.384	16.384	0.2	19.6608	2.0	2.5
21	81		19200	QPSK	2/3	1	16.384	16.384	0.2	19.6608	4.7	3.5
22	89		45000	QPSK	7/9	1	32.768	32.768	0.2	39.3216	6.1	4.2
23		5	2048	QPSK	2/9	4	5.12	20.48	0.2	24.576	-7.2	2.3
24		11	256	QPSK	1/9	23	1.28	29.44	0.2	35.328	-17.6	2.5
25			4800	QPSK	1/3	1	8.192	8.192	0.2	9.8304	0.5	2.3
26			8000	QPSK	5/9	1	8.192	8.192	0.2	9.8304	3.3	2.8
Notes:
1. Ref ID-1: GA-ASI UK Protector MODCOD Reference ID
2. Ref ID-2: GA-ASI NGSO MODCODs Reference ID
3. ID 25 and ID 26 are added to HM System for FEC rate 1/3 and 5/9

HUGHES PROPRIETARY

This document contains ITAR-controlled technical data. Access restricted.

HUGHES PROPRIETARY

Impl Loss

GA MODCODs Implementation Loss

3/10/2022

ID Modulation

(1 = BPSK,

2 = QPSK,

3 = 8PSK,

4 = 16APSK,

5 = 32APSK)	LDPC Code Rate	Spreading Factor	Floating-point Simulation Es/No (dB)
BuER 1e-5 or less	Fixed-point Simulation Es/No (dB)
BuER 1e-5 or less	Theoretical Es/No (dB)
BuER 1e-5 or less	Theoretical Ebi/No (dB)
BuER 1e-5 or less	Measured Min Es/No (dB)
BuER 1e-5 or less	Measured Min Ebi/No (dB)
BuER 1e-5 or less	Measured Max Es/No (dB)
BuER 1e-5 or less	Measured Max Ebi/No (dB)
BuER 1e-5 or less	Minimum Implementation Loss (dB)	Maximum Implementation Loss (dB)	Spec Es/No (dB)
BuER 1e-5 or less	Spec Ebi/No (dB)
BuER 1e-5 or less		Worst Case Margin (dB)	Measured Es/No during WGS Test per GA Ref ID MODCODs
	8	1	1/9	1		-8.25	-8.3	1.2	-8.0	1.5	-7.9	1.6	0.3	0.4	-7.2	2.3	0.7	4(-8.0), 90(-7.9=-13.9+6)
	1	2	1/9	1	-5.2	-5.20	-5.2	1.3	-4.6	1.9	-4.4	2.1	0.6	0.8	-4.0	2.5	0.4	27(-4.4), 41(-4.6), 62(-4.4)
	2	2	2/9	1	-2.5	-2.50	-2.5	1.0	-2.2	1.3	-1.9	1.6	0.3	0.6	-1.5	2.0	0.4	14(-1.9), 28(-2.1), 42(-2.2), 56(-2.2), 63(-2.1), 93(-2.1=-8.1+6)
	3	2	1/3	1	-0.7	-0.62	-0.6	1.2	-0.3	1.4	-0.3	1.4	0.3	0.3	0.5	2.3	0.8	Measured in LFF 3rd FL Lab by 2/2/2022
	4	2	4/9	1	0.8	0.90	0.9	1.4	1.2	1.7	1.6	2.1	0.3	0.7	2.0	2.5	0.4	30(1.3), 44(1.2), 58(1.2), 65(1.3), 79(1.6)
	5	2	5/9	1	2.1	2.22	2.2	1.7	2.4	1.9	2.4	1.9	0.2	0.2	3.3	2.8	0.9	Measured in LFF 3rd FL Lab by 2/2/2022
	6	2	2/3	1	3.5	3.48	3.5	2.3	3.7	2.5	4.1	2.9	0.2	0.6	4.7	3.5	0.6	46(3.7), 60(3.8), 67(3.8), 81(4.1)
	7	2	7/9	1	4.8	4.85	4.9	3.0	5.1	3.2	5.6	3.7	0.2	0.7	6.1	4.2	0.5	68(5.1), 89(5.6)

8	1	1/9	1	-8.25	-8.3	1.2	-8.0	1.5	-7.9	1.6	0.3	0.4	-7.2	2.3	0.7	4(-8.0), 90(-7.9=-13.9+6)
Note:
1. Rate 1/9 has larger implementation loss (0.6 - 0.8dB) than other higher rates. This might be due to not enough iteration and shorter UW length.
2. Rate 2/9: 0.64Msps (ID14) showed largest implementation loss (0.6dB) on HM400. ID14 implementation loss on HM100 is 0.3dB.
3. Rate 4/9: 16.384Msps (ID79) showed largest implementation loss (0.6dB) on both HM100 and HM400.
4. Rate 2/3: 16.384Msps (ID81) showed largest implementation loss (0.6dB) on both HM100 and HM400.
5. Rate 7/9: 32.768Msps (ID89) showed largest implementation loss (0.7dB) on both HM100 and HM400.
6. Floating-point simulation

File details come from the government source that posted it. Updated Jul 24, 2025.