Research for applying M-ary amplitude and phase shift keying modulation to mobile communications

多进制幅相移键控调制在移动通信中的应用研究

• 批准号: 12650374
• 负责人: HANDA Shiro
• 金额: $ 2.11万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650374/
• 关键词: Multiple-symbol differential detection; Non-Coherent Detection; M-ary amplitude and phase shift keying; Turbo Coding; Sliding MSDD; Fading; Mobile Communications; 最大事後確率推定; 多シンボル遅延検波; 自己相関; 高速算法; ターボ符号; 多値変調; 周波数選択性フェージング; 符号化変調方式; 多値伝送; 振

Multiple-symbol differential detection (MSDD) considering the auto-correlation among the received signals is applied to M-ary amplitude and phase shift keying modulation. The SER performances of 16APSK and 32APSK with this detection scheme show better than that of the conventional methods in the past literature. To reduce the complexity and the computational efforts in the receiver, a fast calculation method is proposed and it is applied to tree path search using M-algorithm in this detection scheme. As the result, the sequence length of received signals to be estimated can be chosen quite large under a practicable receiver structure, and we confirm that the SER performance shows almost the same as that of the ideal coherent detection with the optimum ring ratio and error floor is not appeared even for relatively fast fading channels.Lastly, we propose iterative decoding for serial concatenation coded M-ary differential amplitude and phase shift keying (MDAPSK) using multiple-symbol differential detection metric. In the transmitter, serial concatenated convolutinal code is used in a turbo encoder, and the output of the encoder is modulated with the differential star quadrature amplitude modulation. In the receiver, the turbo decoder takes iterative decoding to the output of Soft Output MSDD (SO-MSDD). To use random-interleaver in turbo encoder and decoder, we approximate the decision metric of the MSDD. Moreover, to make reliability among symbols equal, sliding MSDD is used here. And the fast calculation algorithm (FCA) is used to get the decision metric of the MSDD considering the autocorrelation of a received sequence. Through computer simulations, it is confirmed that the bit error rate performance of this system is closer to that of the ideal coherent detection without differential encoding as the length of an observed sequence becomes larger over Rayleieh fading channels.

将考虑接收信号自相关的多符号差分检测（MSDD）应用于M进制幅度相移键控调制。16 APSK和32APSK的误码率性能均优于以往文献中的常规检测方法。为了降低接收端的复杂度和计算量，提出了一种快速计算方法，并将其应用于M算法的树路径搜索中。结果表明，在实际的接收机结构下，待估计接收信号的序列长度可以选择得很大，在最佳振铃比条件下，其误码率性能与理想相干检测的误码率性能几乎相同，并且在相对快衰落信道下也不会出现错误平层。我们提出了使用多符号差分检测度量的串行级联编码的M进制差分幅度和相移键控（MDAPSK）的迭代解码。在发射机中，Turbo码采用串行级联卷积码，编码器输出采用差分星星正交幅度调制。在接收端，Turbo译码器对软输出MSDD（SO-MSDD）的输出进行迭代译码。为了在Turbo码编解码器中使用随机交织器，我们对MSDD的判决度量进行了近似。此外，为了使符号之间的可靠性相等，这里使用滑动MSDD。考虑到接收序列的自相关性，采用快速计算算法（FCA）得到MSDD的判决度量。通过计算机仿真，证实了在瑞利衰落信道中，随着观测序列长度的增大，该系统的误比特率性能更接近于理想的无差分编码相干检测。

项目成果

Yusuke Okano, Shiro Handa, et al.: "Multiple-Symbol Differential Detection Considering Autocorrelation over Frequency Selective Fading Channels"Proc. of the 7th Asia-Pacific Conference on Communications 2001. 481-484 (2001)

Yusuke Okano、Shiro Handa 等人：“考虑频率选择性衰落信道上的自相关的多符号差分检测”Proc。

F.SASAMORI, H.UMEDA, S.HANDA, F.MAEHARA, et al.: "Approximate Equation of Bit Error Rate in DQPSK/OFDM Systems over Fading Channels"Proc. of European Wireless 2002. 1. 602-607 (2002)

F.SASAMORI、H.UMEDA、S.HANDA、F.MAEHARA 等人：“衰落信道上 DQPSK/OFDM 系统中误码率的近似方程”Proc。

Shiro Handa, Yusuke OKANO, et al.: "Fast Calculation Algorithm and Error Performance of MSDD over Fading Channels"IEICE Trans. on Communications. E86-B・3. 1050-1056 (2003)

Shiro Handa、Yusuke OKANO 等人：“衰落信道上 MSDD 的快速计算算法和错误性能”IEICE Trans on Communications（通信）。

F.Sasamori, A.Yamano, Shiro Handa, et al.: "Approximate Equation of Bit Error Rate in OFDM Systems over Specular Multipath Fading Channels"Proc. the IEEE WCNC'03. (採録決定). (2003)

F.Sasamori、A.Yamano、Shiro Handa 等人：“镜面多径衰落信道上 OFDM 系统中的误码率近似方程”Proc. IEEE WCNC03（已接受）。

F.SASAMORI, F.MAEHARA, S.HANDA, S.OSHITA, F.TAKAHATA: "Approximate Equation of Average Bit Error Rate in DS--CDMA Systems over Fading Channels"IEEE Trans. on Communications. (採録決定). (2003)

F.SASAMORI、F.MAEHARA、S.HANDA、S.OSHITA、F.TAKAHATA：“衰落信道上 DS--CDMA 系统中的平均误码率近似方程”IEEE Trans on Communications（已接受）。