| UP | AT BOTTOM | ||
|---|---|---|---|
| Support MUOS All IP Services with the FEC Enhancement | |||
| Chu,Liang | Lockheed Martin Corporation | ||
| The MUOS (Mobile User Objective System) relies on 3GPP technology to support between the mobile users and ground stations. In order to achieve all IP core services in the ground stations, the bit-error-rate (BER) required to support IP traffic in wideband satellite communication systems such as WGS and TSAT can be as low as 10e-8. BER indicates how often a bit will be misinterpreted, and lower BER results in more reliable and consistent data transmission. The channel code specified in 3GPP is an 8-state PCCC (parallel concatenated constituent code) which suffers BER “flooring” as early as 10e-6. It is hard to achieve BER of 10e-8 without a significantly large channel SNR (signal-to-noise ratio) margin. This unnecessarily large margin may impose a problem in closing the user-to-base (U2B) link budget and limit the link availability. In this paper, we propose to employ SCCC (serial concatenated constituent coding) as an enhancement on the U2B channel coding to support MUOS all IP core services and also to provide extra link margin. Our proposed enhancement has comparable implementation complexity as an 8-state PCCC and does not suffer BER “flooring” at BER of 10e-8. This paper will provide a comparative analysis of various traffics through this link with and without our proposed enhancement. | |||
| Liang C. Chu received his Ph.D. degree in electrical and computer engineering from the Georgia Institute of technology. He is now a senior staff engineer with the Advanced Technology Center, Lockheed Martin Coropration in Palo Alto/Sunnyvale CA. Previously, he was with IBM Corporation, Communications Research and Development Center in NY and Titan Corporation in Los Angeles. He was also an adjacent assistant professor in the Department of Electrical and Computer Engineering of Manhattan College in NY. His research interest is in the area of wireless/satellite communications, modulation and error correction coding applications, and broadband technologies/high-speed networks. | |||