Comparison of space-time block code and layered space-time MIMO systems for an underwater acoustic channel

Over recent years, various modulation and coding techniques have been proposed in MIMO wireless communication systems. A MIMO system uses the concept of spatial diversity which is very successful and promising technique. When a coherent transmission system is considered, the estimation of radio channel impulse response is done precisely. In MIMO systems, the radio channel is estimated among every transmitting and receiving antennas such that the complexity can be increased. For this reason, in MIMO systems differential modulation schemes are estimated. A Differential Space-Time Block Code (DSTBC) is useful in the Raleigh fading channel as they do not require channel estimates. Space-time coding with MIMO antennas at transmitting and receiving reduces the consequences of fading in multiple paths and therefore the performance of digital transmission throughout wireless radio channel can be improved. So it has been presumed that perfect CSI is available at the receiver and coherent detection is employed. This paper presents improvement of Frame Error Rate (FER) for differential space-time block code using various Doppler spectra. When the channels estimates are not available the DSTBC system noticed that at SNR of 10 dB, for two transmitting and four receiving antennas the FER is 0.0067 for rounded Doppler spectrum. The differential schemes attains full transmit diversity owing to orthogonal designs. However, the receiver or the transmitter needs the channel state information so these differential schemes are 3 dB worse than the STBC with coherent detection.

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MIMO-Orthogonal space time block code system joint with BCH-TC in Rayleigh fading channel for performance of transmit antenna selection

Journal of Engineering Design and Technology ◽

10.1108/jedt-01-2021-0025 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Nitin Tejram Deotale

Keyword(s):

Mimo Systems ◽

Antenna Selection ◽

Turbo Code ◽

Block Code ◽

Space Time ◽

Time Block ◽

Transmit Antenna Selection ◽

Content Type ◽

Space Time Block Code ◽

Orthogonal Space

Purpose To enhance the performance transmit antenna selection (TAS) of spatial modulation (SM), systems technique needs to be essential. This TAS is an effective technique for reducing the multiple input multiple output (MIMO) systems computational difficulty, and bit error rate (BER) can increase remarkably by various TAS algorithms. But these selection methods cannot provide code gain, so it is essential to join the TAS with external code to obtain cy -ode gain advantages in BER. Design/methodology/approach In this paper, Bose–Chaudhuri–Hocquenghem (BCH)-Turbo code TC is combined with the orthogonal space time block code system. Findings In some existing work, the improved BER has been perceived by joining forward error correction code and space time block code (STBC) for MIMO systems provided greater code gain. The proposed work can provide increasing code gain and the effective advantages of the TAS-OSTBC system. Originality/value To perform the system analysis, Rayleigh channel is used. In the case with multiple TAS-OSTBC systems, better performance can provide by this new joint of the BCH-Turbo compared to the conventional Turbo code for the Rayleigh fading.

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Blind recognition of space time block code in MIMO systems

Digital Signal Processing ◽

10.1016/j.dsp.2018.08.011 ◽

2018 ◽

Vol 83 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Chung Buiquang ◽

Tianqi Zhang

Keyword(s):

Mimo Systems ◽

Block Code ◽

Space Time ◽

Time Block ◽

Space Time Block Code ◽

Blind Recognition

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Rateless Space Time Block Code for Massive MIMO Systems

International Journal of Antennas and Propagation ◽

10.1155/2014/154261 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Ali H. Alqahtani ◽

Ahmed Iyanda Sulyman ◽

Abdulhameed Alsanie

Keyword(s):

Massive Mimo ◽

Mimo Systems ◽

Block Code ◽

Space Time ◽

Antenna Element ◽

Channel Fading ◽

Time Block ◽

Fixed Rate ◽

Space Time Block Code ◽

Erasure Channels

This paper presents a rateless space time block code (RSTBC) for massive MIMO systems. The paper illustrates the basis of rateless space time codes deployments in massive MIMO transmissions over wireless erasure channels. In such channels, data may be lost or is not decodable at the receiver due to a variety of factors such as channel fading, interference, or antenna element failure. We show that RSTBC guarantees the reliability of the system in such cases, even when the data loss rate is 25% or more. In such a highly lossy channel, the conventional fixed-rate codes fail to perform well, particularly when channel state information is not available at the transmitter. Simulation results are provided to demonstrate the BER performance and the spectral efficiency of the proposed scheme.

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