中文摘要：

理论上分析了陆地移动卫星信道（LMSC，Land—Mobile Satellite Channel）在采用六状态马尔科夫（Markov）模型情况下的平均BER（Bit Error Rate，误码率），并分别得到了没有采用分集和采用L分支的MRC分集（Maximal Ratio Combining，最大比合并）情况下平均BER的闭环表达式．在不同环境条件下，并考虑采用分集接收和不采用分集接收时，对BPSK（Binary Phase—Shift Keying，二进制相移键控）调制下的六状态和两状态的平均BER进行仿真比较．通过仿真验证了六状态Markov模型的有效性．

英文摘要：

Theoretical analysis of the BER under Land - Mobile Satellite Channel （LMSC） circumstances using Six -State Markov Model was presented. It is also calculated the close -form expression of BER when receiving diversity was not used and the close - form expression of BER when L - Branch Micro - Diversity with Maximal Ratio Combining （MRC） was used. It is compared the BER between Six - State Markov Model and Two- State Markov Model under BPSK modulation when receiving diversity was adopted or was not adopted. The Six - State Markov Model was proved to be valid by the simulation.