Next-generation wireless communications concepts and technologies

2002 ◽  
Vol 40 (3) ◽  
pp. 108-116 ◽  
Author(s):  
R. Berezdivin ◽  
R. Breinig ◽  
R. Topp
Keyword(s):  
Wireless Communications ◽  
Next Generation

Intelligent Radio for Next Generation Wireless Communications: An Overview

2019 ◽  
Vol 26 (4) ◽  
pp. 94-101 ◽  
Author(s):  
Qi-Yue Yu ◽  
Hong-Chi Lin ◽  
Hsiao-Hwa Chen
Keyword(s):  
Wireless Communications ◽  
Next Generation

The Next Generation CDMA Technology for Futuristic Wireless Communications

2012 ◽  
pp. 2014-2041
Author(s):  
Hsiao-Hwa Chen
Keyword(s):  
Wireless Communications ◽  
Multiple Access ◽  
High Speed ◽  
Transmission Rate ◽  
Design Method ◽  
Multiple Access Interference ◽  
Code Design ◽  
Next Generation ◽  
Ongoing Research ◽  
Research Activities

This chapter addresses the issues on the architecture of next generation CDMA (NG-CDMA) systems, which should offer a much better performance in terms of its capacity and transmission rate, etc., than that possible in all current 2-3G systems based on CDMA technology. The ultimate goal is to engineer a CDMA system, whose performance will no longer be interference-limited, for its application in futuristic wireless communications. To achieve this, many challenging issues should be tackled, such as innovated design approaches for CDMA codes, multi-dimensional spreading techniques, suitable CDMA signaling format for high-speed bursty traffic, and so forth. This chapter will review the author’s ongoing research activities on the NG-CDMA technology, which can offer a performance never inferior to that of orthogonal frequency division multiple access (OFDMA) technology. In particular, the author will briefly introduce a new CDMA code design method, called Real Environment Adapted Linearization (REAL) approach, which can be used to generate CDMA code sets with inherent immunity against multipath interference and multiple access interference for both uplink and downlink transmissions. The chapter will also illustrate that an interference-free CDMA can only be made possible with the application of orthogonal complementary codes (OCCs). The use of traditional CDMA codes, such as Gold, Kasami, Walsh-Hadamard and OVSF codes, all working on an one-code-per-channel basis, will never help in this sense. Several other topics related to the NG-CDMA technology will also be addressed, such as system performance issues, other properties of the NG-CDMA technology, and so on.

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