CRITICAL ANALYSIS OF A COMBINED HUFFMAN AND CONVOLUTIONAL CODING SCHEME

2006 ◽  
Vol 15 (04) ◽  
pp. 641-657
Author(s):  
K. M. S. SOYJAUDAH ◽  
T. P. FOWDUR
Keyword(s):  
Channel Coding ◽  
Critical Analysis ◽  
Mathematical Proof ◽  
Hardware Complexity ◽  
Error Performance ◽  
Joint Decoding ◽  
Convolutional Coding ◽  
Coding Scheme ◽  
Time And Space Complexity ◽  
Separate Scheme

In this paper, a critical analysis of the joint source channel coding scheme proposed by Honary et al.1 is given. We show mathematically that although the algorithm leads to a reduction in the overall number of decoding states it increases both the time and space complexity of the decoding process. Moreover, the hardware complexity of the proposed scheme is also analyzed and it is observed that the joint decoding algorithm is in the first place extremely complex to implement and secondly, it significantly increases the number of components required, thereby increasing the power consumption. A mathematical proof that the joint decoding scheme has the same error performance as a separate scheme is also given. Finally, the simulation results show that the joint decoding scheme takes a significantly greater time to decode than a separate scheme, for the same error performance.

Viterbi Decoder Design of Beidou RDSS Receiver

2013 ◽  
Vol 431 ◽  
pp. 331-335
Author(s):  
Xiao Hu Yu
Keyword(s):  
Channel Coding ◽  
Optimized Design ◽  
Receiver Design ◽  
Viterbi Decoder ◽  
Hardware Complexity ◽  
Coding Scheme ◽  
Constraint Length ◽  
Decoder Design ◽  
Convolutional Encoding

Firstly, the convolutional encoding with constraint length of 7 is used as the channel coding scheme in Beidou RDSS system. In addition, in receiver design Viterbi Decoder serves as the decoder of convolutional encoding. Finally, the optimized design of hardware construction in traditional Viterbi compared with that in decoder is introduced to reduce hardware complexity.

scholarly journals An overview of channel coding for 5G NR cellular communications

2019 ◽  
Vol 8 ◽  
Author(s):  
Jung Hyun Bae ◽  
Ahmed Abotabl ◽  
Hsien-Ping Lin ◽  
Kee-Bong Song ◽  
Jungwon Lee
Keyword(s):  
Channel Coding ◽  
Ldpc Codes ◽  
Low Latency ◽  
Polar Codes ◽  
Coding Scheme ◽  
Coding Schemes ◽  
Successive Cancellation ◽  
New Radio ◽  
Key Characteristics ◽  
User Data

AbstractA 5G new radio cellular system is characterized by three main usage scenarios of enhanced mobile broadband (eMBB), ultra-reliable and low latency communications (URLLC), and massive machine type communications, which require improved throughput, latency, and reliability compared with a 4G system. This overview paper discusses key characteristics of 5G channel coding schemes which are mainly designed for the eMBB scenario as well as for partial support of the URLLC scenario focusing on low latency. Two capacity-achieving channel coding schemes of low-density parity-check (LDPC) codes and polar codes have been adopted for 5G where the former is for user data and the latter is for control information. As a coding scheme for data, 5G LDPC codes are designed to support high throughput, a variable code rate and length and hybrid automatic repeat request in addition to good error correcting capability. 5G polar codes, as a coding scheme for control, are designed to perform well with short block length while addressing a latency issue of successive cancellation decoding.

Atmospheric Laser Communication Receives a High Rate of Laser Technology

2014 ◽  
Vol 912-914 ◽  
pp. 585-588
Author(s):  
Quan Liu ◽  
Xu Yang ◽  
Yi Feng Zhu
Keyword(s):  
Channel Coding ◽  
Detection Method ◽  
High Rate ◽  
Laser Communication ◽  
Transmission Channel ◽  
Laser Technology ◽  
Coding Scheme ◽  
Rs Code ◽  
Atmospheric Channel ◽  
Channel Environment

This paper mainly discusses laser receiver technology at atmospheric channel high-rate environmentThesis analyzes the influencing factors of atmospheric laser transmission channel, Discussed the composition of the laser receiving system to study the floating threshold signal detection method of the laser, Study interleaved RS code + code to achieve channel coding scheme, the final results of the tests are given under the channel environment is a high rate of atmospheric laser receiving system.

scholarly journals Performance analysis of coded 8-pssk system with MRC diversity in fading channels

2018 ◽  
Vol 7 (3.3) ◽  
pp. 107
Author(s):  
Jae Young Chun ◽  
Kee Soo Yeom ◽  
Eon. Gon. Kim
Keyword(s):  
Low Power ◽  
Fading Channels ◽  
Channel Coding ◽  
Performance Gain ◽  
Coding Gain ◽  
Power Efficient ◽  
Coding Scheme ◽  
Communication Technique ◽  
Increasing Demand ◽  
Diversity Technique

Due to the increasing demand for low power communication in the field of remote control & monitoring, it is necessary to introduce a communication technique to meet the various QoS requirements even in an inferior radio channels. In order to ensure these QoS requirements, we propose a communication technique that applies the channel code, diversity scheme into power-efficient modulation. It makes the radio possible to dramatically improve BER by reducing the uncertainty due to fading channels. A core of proposed communication technique is to maximize the performance gain by adopting diversity technique and channel coding scheme. Diversity gain and channel coding gain further increase the performance difference (gain) between power-efficient modulation and conventional modulation, resulting in a signification BER improvement. By adapting the proposed communication technique it is expected to improve the usability of low-power radio according to the satisfaction of the various QoS requirements.  

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