Wireless mobile communications at the start of the 21st century

2001 ◽  
Vol 39 (1) ◽  
pp. 110-116 ◽  
Author(s):  
Qi Bi ◽  
G.L. Zysman ◽  
H. Menkes
Keyword(s):  
21St Century ◽  
Mobile Communications ◽  
Wireless Mobile Communications ◽  
Wireless Mobile

Doppler Diversity Transmitter for OFDM Wireless Mobile Communications Based on Fixed Track

2012 ◽  
Vol 457-458 ◽  
pp. 940-947
Author(s):  
Jin Tang Wang ◽  
Lai Bo Zheng ◽  
Xin Feng Zhao ◽  
Ming Juan Huang ◽  
Jian Li Wang
Keyword(s):  
Mobile Communications ◽  
High Speed ◽  
Wireless Mobile Communications ◽  
Doppler Diversity ◽  
Channel Information ◽  
Wireless Mobile ◽  
Better Than

A Doppler diversity transmitter for OFDM high-speed mobile communications based on fixed track is proposed. Because of fixed track, we can get the channel information and branches’ weights in advance, utilize the channel information do pre-equalization for every branch in transmitter. After modulation, branch outputs are individually frequency shifted, weighted and added together. Extensive simulations show that the proposed transmitter alters the statistics of the fading to improve BER significantly and better than the Doppler diversity receiver’s performance.

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