scholarly journals Performance improvement of 4G OFDM systems using CTSTC techniques

2018 ◽  
Vol 7 (2.21) ◽  
pp. 131
Author(s):  
C Padmaja ◽  
B L. Malleswari
Keyword(s):  
Channel Coding ◽  
Communication Systems ◽  
Performance Enhancement ◽  
Space Time ◽  
Ofdm Systems ◽  
Coding Gain ◽  
Space Time Coding ◽  
Rate Transmission ◽  
Time Encoding ◽  
Data Rate Transmission

The concatenation of channel coding and diversity schemes are essential in the 4G communication systems to improve the reliable data rate transmission. To address Bit Error Rate performance enhancement, the paper presents the coding gain and diversity gain benefits using the proposed CTSTC scheme by adding modified Turbo features and Space Time encoding features. Simulation results of are provided using MATLAB and compared the results with convolutional coded Space Time Coding technique.  

Space-Time Coding Technique Based on Four-Antenna Transceiver System

2011 ◽  
Vol 135-136 ◽  
pp. 913-917
Author(s):  
Yan Chu ◽  
Chun Hua Deng ◽  
Yan Shao ◽  
Hai Guang Wang
Keyword(s):  
Communication Systems ◽  
Transmission Rate ◽  
Block Code ◽  
Space Time ◽  
Space Time Coding ◽  
Time Diversity ◽  
Rate Transmission ◽  
Full Rate ◽  
Self Adaptation ◽  
Time Coding

Space-time block code, as one of the space-time codes, greatly improves the performance in the cooperative wireless communication systems by the use of space and time diversity. However, traditional STBC can’t enhance the overall transmission rate and there is no form of complex codes with the rate of 1 when the number of antenna is more than 2. In order to design codes with full-rate, we refer to quasi-orthogonal STBC whose generator matrix is orthogonal between its subspaces. In this paper, based on the combination of QO-STBC and Self-adaptation technology, we propose a new plan of space-time coding which dismisses the interference among symbols when decoding and advances the coding capabilities in the context of full-rate transmission, finally we justify the new plan through lots of computational simulations.

LDPC based time-frequency double differential space-time coding for multi-antenna OFDM systems

2006 ◽  
Vol 7 (2) ◽  
pp. 141-148
Author(s):  
Ji-feng Tian ◽  
Hai-ning Jiang ◽  
Wen-tao Song ◽  
Han-wen Luo
Keyword(s):  
Space Time ◽  
Ofdm Systems ◽  
Space Time Coding ◽  
Time Frequency ◽  
Time Coding

Differential space-time block coding method for application in mobile radio communication systems using MIMO technology.

2021 ◽  
Author(s):  
M.S. Tokar ◽  
◽  
I.V. Ryabov ◽  
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Communication Channel ◽  
Space Time ◽  
The State ◽  
Radio Communication ◽  
Transmission Method ◽  
Space Time Coding ◽  
Channel One ◽  
Differential Transmission

In radio communication systems, when implementing coherent types of reception, it is assumed that the receiver knows information about the state of the communication channel, which is achieved by introducing signal redundancy (pilot signals). The frequency of sending pilot signals depends on factors that change the state of the communication channel, one of which is the high speed of movement of mobile stations. The use of pilot signals not only hinders the efficient use of the radio frequency resource, but also, in the case of fast fading, does not allow the channel to be estimated and tracked with the required accuracy. These disadvantages can be eliminated by using the differential transmission method, for the implementation of which there is no need to know information about the state of the channel. The application of the principles of differential transmission to space-time coding does not find sufficiently effective solutions that combine low computational complexity and energy efficiency of differential coding methods.

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