MCMA等化器在四根發射天線時空編碼之應用

Estimation of Four Transmitting Antennas Space-Time Block Code by Modified Constant Modulus Algorithm (MCMA)

游智凱(Chih-Kai Yu)

指導教授 ： 張豫虎

中原大學/工學院/電子工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000277

摘要

Twin-QPSK正交時空編碼利用四根傳送天線，具有正交性(Orthogonal)、全散度(Diversity)，及碼率(Code Rate)為一的特性。解碼端部份，本研究利用盲目等化(Blind Equalization)的方式，使用改良式定值模數演算法(MCMA)，不需另外在傳送端傳送已知訓練序列(Training Sequence)，即可將四個原始發射訊號正確估測出來，此方式不僅増加了頻寬的使用效率，更降低了系統的複雜度。

關鍵字

盲目等化 ； 定值模數演算法 ； Twin-QPSK ； 改良式定值模數演算法 ； 時空編碼

並列摘要

Twin-QPSK is a four transmitting antennas space-time coding system with the features of orthogonal, full diversity, and full code rate. Here, the blind equalization at the receiver is proceeded by using the Modified Constant Modulus Algorithm (MCMA) which can estimate the transmitting signal without the training sequence in the system. The simulation results show that the original transmitted signals can be estimated efficiently. Compared with semi-blind algorithm, this approach not only increases the efficiency of using bandwidth, but also reduces the complexity of the system.

並列關鍵字

modified constant modulus algorithm ； space-time block code ； Twin-QPSK ； constant modulus algorithm ； blind equalization

參考文獻

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data rate wireless communication: Performance criterion and code

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