发明名称 |
APPARATUS AND METHOD FOR SUPPORT OF COMMUNICATIONS SERVICES AND APPLICATIONS OVER RELATIVELY LOW SIGNAL-TO-NOISE RATIO LINKS |
摘要 |
A physical layer (PL) frame generation method is provided. A PL payload is generated by encoding and modulating source data based on a first modcod of a first set. A synchronization header (a unique word (UW) of a UW set) is appended to the PL payload. The UWs of the set respectively correspond to different modcods of the first set, and the UW corresponds to the first modcod. A PL header is appended to the synchronization header and PL payload to form the PL frame. The PL header comprises a second UW and physical layer signaling (PLS). The PLS comprises encoded data fields reflecting a length of the PL frame, where the data fields are encoded based on a second modcod scheme of a second set. The first modcod set is designed for an SNR operating range relatively lower than the SNR operating range of the second modcod set. |
申请公布号 |
US2014226682(A1) |
申请公布日期 |
2014.08.14 |
申请号 |
US201313763731 |
申请日期 |
2013.02.10 |
申请人 |
HUGHES NETWORK SYSTEMS, LLC |
发明人 |
BECKER Neal;Lee Lin-Nan |
分类号 |
H04L29/06 |
主分类号 |
H04L29/06 |
代理机构 |
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代理人 |
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主权项 |
1. A method for generating a physical layer (PL) data frame for transmission over a wireless communications network, the method comprising:
generating a PL data payload by encoding and modulating one or more source data frames in accordance with a first modulation and coding (modcod) scheme selected from a first set of modcod schemes; appending a synchronization (sync) header to the PL data payload, wherein the sync header comprises a one unique word (UW) of a UW set, wherein each UW of the UW set corresponds to a different respective one of the first set of modcod schemes, and the one UW of the sync header corresponds to the selected first modcod scheme; and appending a PL header to the combined sync header and PL data payload to form the PL data frame, wherein the PL header comprises a second UW and physical layer signaling (PLS) data, wherein the PLS data comprises encoded data fields reflecting information indicating a length of the PL data frame, and wherein the data fields are encoded in accordance with a second modcod scheme selected from a second set of modcod schemes; wherein each modcod scheme of the second set is designed for terminals of a second signal-to-noise ratio (SNR) operating range, and each modcod scheme of the first set is designed for terminals of a first SNR operating range that is relatively lower than the second SNR operating range. |
地址 |
Germantown MD US |