A transmitter diversity scheme for wideband CDMA systems based on space-time spreading

2001 ◽  
Vol 19 (1) ◽  
pp. 48-60 ◽  
Author(s):  
B. Hochwald ◽  
T.L. Marzetta ◽  
C.B. Papadias
Keyword(s):  
Space Time ◽  
Wideband Cdma ◽  
Transmitter Diversity ◽  
Cdma Systems ◽  
Diversity Scheme

Transmitter diversity scheme for OFCDMA systems based on space-time spreading with iterative detection receiver

2017 ◽  
Vol 11 (11) ◽  
pp. 1689-1698 ◽  
Author(s):  
Ahmed Hassan Mansour ◽  
Mona Z. Saleh ◽  
Salwa H. Elramly
Keyword(s):  
Space Time ◽  
Iterative Detection ◽  
Transmitter Diversity ◽  
Diversity Scheme

Design of space-time-frequency transmitter diversity scheme for TDS-OFDM system

2005 ◽  
Vol 51 (3) ◽  
pp. 759-764 ◽  
Author(s):  
Jin-Tao Wang ◽  
Zhi-Xing Yang ◽  
Chang-Yong Pan ◽  
Jian Song ◽  
Lin Yang
Keyword(s):  
Space Time ◽  
Ofdm System ◽  
Transmitter Diversity ◽  
Time Frequency ◽  
Diversity Scheme

scholarly journals Space-time diversity signal processing employed by W-CDMA systems

2019 ◽  
Vol 64 (3) ◽  
pp. 332-346
Author(s):  
V. P. Tuzlukov
Keyword(s):  
Mobile Station ◽  
Base Station ◽  
Space Time ◽  
Prediction Algorithm ◽  
Frequency Diversity ◽  
Transmitter Diversity ◽  
Diversity Techniques ◽  
Maximum Ratio Combining ◽  
Cdma Systems ◽  
Code Division Multiple

Transmit diversity under transmission of signals from the base station to mobile station using the code-division multiple-access (CDMA) system allows us obtaining the performance gains close to the mobile station receiver diversity without complexity of the mobile station receiver antenna array. The multipath diversity can be achieved using the pre-RAKE precoding at the transmitter that could be employed and there is no need to install the RAKE receiver at the mobile station. We investigate several transmitter diversity techniques employed by wideband CDMA (W-CDMA) systems. We also study a possibility to combine transmitter diversity and precoding that achieves the gain of maximum ratio combining of all space and frequency diversity branches jointly with long-term prediction algorithm. It was demonstrated that the performance of the space-time pre-RAKE method approaches the performance of the maximum ratio combining for all space and frequency diversity branches. It is shown that all closed loop methods depend on the long range prediction to approximate the ideal performance in the fast fading environment.

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