Performance Analysis of New Binary User Codes for DS-CDMA Communication

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• 作者：Kamle Usha ; Kottareddygari Jaya Sankar
• 关键词：Gray code ; Inverse gray code ; Binary user codes ; Walsh codes ; Gold codes ; Auto and cross correlation metrics
• 刊名：Journal of The Institution of Engineers (India): Series B
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：97
• 期：1
• 页码：61-67
• 全文大小：650 KB
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• 作者单位：Kamle Usha (1)
  Kottareddygari Jaya Sankar (2)
  
  1. Department of Electronics and Communication Engineering, Maturi Venkata Subba Rao Engineering College, Hyderabad, 501 510, India
  2. Department of Electronics and Communication Engineering, Vasavi College of Engineering, Hyderabad, 500 031, India
  
• 刊物主题：Communications Engineering, Networks;
• 出版者：Springer India
• ISSN：2250-2114

文摘

This paper analyzes new binary spreading codes through correlation properties and also presents their performance over additive white Gaussian noise (AWGN) channel. The proposed codes are constructed using gray and inverse gray codes. In this paper, a n-bit gray code appended by its n-bit inverse gray code to construct the 2n-length binary user codes are discussed. Like Walsh codes, these binary user codes are available in sizes of power of two and additionally code sets of length 6 and their even multiples are also available. The simple construction technique and generation of code sets of different sizes are the salient features of the proposed codes. Walsh codes and gold codes are considered for comparison in this paper as these are popularly used for synchronous and asynchronous multi user communications respectively. In the current work the auto and cross correlation properties of the proposed codes are compared with those of Walsh codes and gold codes. Performance of the proposed binary user codes for both synchronous and asynchronous direct sequence CDMA communication over AWGN channel is also discussed in this paper. The proposed binary user codes are found to be suitable for both synchronous and asynchronous DS-CDMA communication. Keywords Gray code Inverse gray code Binary user codes Walsh codes Gold codes Auto and cross correlation metrics