scholarly journals A Minimum Mean-Square-Error (MMSE) Decoder for Quasi-Orthogonal Space–Time Block Code

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 732
Author(s):  
Jae Jin Jeong
Keyword(s):  
Mean Square Error ◽  
Transmission Rate ◽  
Minimum Mean Square Error ◽  
Estimation Method ◽  
Block Code ◽  
Space Time ◽  
Mean Square ◽  
Time Block ◽  
Space Time Block Code ◽  
Orthogonal Space

The quasi-orthogonal space–time block code (QO-STBC) was introduced to achieve a full transmission rate for the four antennas system. In this paper, a decoding method for the QO-STBC is proposed to improve the bit-error-rate (BER) and to solve a rank-deficient problem. The proposed algorithm is based on the minimum mean-square-error (MMSE) technique. To overcome the implementation problem from the MMSE, an estimation method of the noise variance is developed in this paper. The proposed algorithm is implemented without matrix inversion, therefore, the proposed algorithm achieves a better BER than the conventional algorithms, as it has a low computational complexity. The simulation results show the low BER of the proposed algorithm in a Rayleigh fading channel.

Spatially Modulated Non Orthogonal Space Time Block Code: Construction and design from cyclic codes over Galois Field

2019 ◽  
Vol 35 ◽  
pp. 100735
Author(s):  
Godkhindi Shrutkirthi S. ◽  
Goutham Simha G.D. ◽  
U. Shripathi Acharya
Keyword(s):  
Cyclic Codes ◽  
Block Code ◽  
Galois Field ◽  
Space Time ◽  
Time Block ◽  
Code Construction ◽  
Space Time Block Code ◽  
Orthogonal Space

scholarly journals A Comprehensive Review on Channel Estimation in OFDM System

2019 ◽  
Vol 5 (3) ◽  
pp. 6 ◽  
Author(s):  
Neha Dubey ◽  
Ankit Pandit
Keyword(s):  
Channel Estimation ◽  
Mean Square Error ◽  
Orthogonal Frequency Division Multiplexing ◽  
Transmission Rate ◽  
Minimum Mean Square Error ◽  
Estimation Method ◽  
Least Square ◽  
Estimation Methods ◽  
Mean Square ◽  
Mimo Ofdm

In wireless communication, orthogonal frequency division multiplexing (OFDM) plays a major role because of its high transmission rate. Channel estimation and tracking have many different techniques available in OFDM systems. Among them, the most important techniques are least square (LS) and minimum mean square error (MMSE). In least square channel estimation method, the process is simple but the major drawback is it has very high mean square error. Whereas, the performance of MMSE is superior to LS in low SNR, its main problem is it has high computational complexity. If the error is reduced to a very low value, then an exact signal will be received. In this paper an extensive review on different channel estimation methods used in MIMO-OFDM like pilot based, least square (LS) and minimum mean square error method (MMSE) and least minimum mean square error (LMMSE) methods and also other channel estimation methods used in MIMO-OFDM are discussed.

Quasi-Orthogonal Space-Time Block Code

10.1142/p524 ◽  
2007 ◽  
Author(s):  
Chau Yuen ◽  
Yong Liang Guan ◽  
Tjeng Thiang Tjhung
Keyword(s):  
Block Code ◽  
Space Time ◽  
Time Block ◽  
Space Time Block Code ◽  
Orthogonal Space
Sign in / Sign up

Export Citation Format

Share Document