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Differential modulation based on space-time block codes

机译：基于空时分组码的差分调制

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摘要

A differential modulation scheme using space-time block codes is put forward. Compared with other schemes, our scheme has lower computational complexity and has a simpler decoder. In the case of three or four transmitter antennas, our scheme has a higher rate a higher coding gain and a lower bit error rate for a given rate. Then we made simulations for space-time block codes as well as group codes in the case of two, three, four and five transmit antennas. The simulations prove that using two transmit antennas, one receive antenna and code rate of 4 bits/s/Hz, the differential STBC method outperform the differential group codes method by 4 dB. Useing three, four and five transmit antennas, one receive antenna, and code rate of 3 bits/s/Hz are adopted, the differential STBC method outperform the differential group codes method by 5 dB, 6.5 dB and 7 dB, respectively. In other words, the differential modulation scheme based on space-time block code is better than the corresponding differential modulation scheme
机译：提出了一种使用空时分组码的差分调制方案。与其他方案相比，我们的方案具有较低的计算复杂度和更简单的解码器。对于三个或四个发射机天线，对于给定的速率，我们的方案具有较高的速率，较高的编码增益和较低的误码率。然后，我们对两个，三个，四个和五个发射天线的时空分组码以及组码进行了仿真。仿真证明，使用两根发射天线，一根接收天线和4位/秒/赫兹的编码率，差分STBC方法比差分群码方法要好4 dB。采用三个，四个和五个发射天线，一个接收天线和3 bit / s / Hz的编码速率，差分STBC方法的性能分别比差分群编码方法高5 dB，6.5 dB和7 dB。换句话说，基于空时分组码的差分调制方案要优于相应的差分调制方案

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