Downlink channels identification for space-time coded multiple-input multiple-output MC-CDMA systems

2004 ◽  
Author(s):  
Xiaojun Wu ◽  
Qinye Yin ◽  
Yanxing Zeng
Keyword(s):  
Multiple Input Multiple Output ◽  
Space Time ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Cdma Systems ◽  
Downlink Channels

Lattice Reduction Algorithm Based Uplink MC-CDMA

2015 ◽  
Vol 738-739 ◽  
pp. 391-396
Author(s):  
Umut Yunus ◽  
Askar Hamdulla ◽  
Zhen Hong Jia ◽  
Kurban Ubul
Keyword(s):  
Communication Systems ◽  
Multiple Access ◽  
Multiple Input Multiple Output ◽  
Lattice Reduction ◽  
Rate Performance ◽  
Multiple Input ◽  
High Spectral Efficiency ◽  
Input Multiple Output ◽  
Cdma Systems ◽  
Multi Access

MC-CDMA integrates the advantages of OFDM with those of CDMA, it has high spectral efficiency, robustness against multi-path propagation and multiple access flexibility. Due to the above mentioned merits, it has been considered as a candidate for future wireless. In recent years, lattice reduction technique is discussed in multiple input multiple output communication systems, and has been shown with its better performance. The purpose of this paper is to express a model for uplink MC-CDMA systems in matrix form and then to propose a lattice reduction aided multiuser detection, in order to ameliorate the affects of inter-carrier interference and multi access interference. The effectiveness of the proposed method is evaluated by the bit error rate performance.

Threaded Space Time Code Design for CPM with Joint Decoding

2014 ◽  
Vol 631-632 ◽  
pp. 847-850
Author(s):  
Guo Wei Lei ◽  
Yuan An Liu ◽  
Xue Fang Xiao
Keyword(s):  
Phase Modulation ◽  
Multiple Input Multiple Output ◽  
Continuous Phase ◽  
Space Time ◽  
Continuous Phase Modulation ◽  
Code Design ◽  
Time Code ◽  
Soft Decoding ◽  
Multiple Input ◽  
Input Multiple Output

In the letter, a system of continuous phase modulation (CPM) with threaded space time codes (TSTC) is proposed for multiple-input multiple-output systems. In the system, source bits are coded via outer coder of Reed Solomon (RS). The codeword of which is suitable for TSTC design. Then inner coder mainly converts binary symbols into M-ary symbols for purpose of CPM. At receiver, Joint soft decoding approach is considered. Finally simulation results are provided for VBLAST, DBLAST, and TSTC as comparison.

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