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Bit error rate

About: Bit error rate is a research topic. Over the lifetime, 43142 publications have been published within this topic receiving 508173 citations. The topic is also known as: Bit error ratio & BER.


Papers
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Patent
20 Aug 1997
TL;DR: In this article, bit streams are divided on a block-by-block basis based on information of bit numbers and a parity bit added to each bit stream is checked to generate a switching signal.
Abstract: Bit streams are divided on a block-by-block basis based on information of bit numbers and a parity bit added to each bit stream is checked to generate a switching signal. Either each bit stream or a proximate bit stream for each bit stream is selected as an optimum bit stream based on the switching signal, wherein the proximate bit stream is generated based on degrees of proximity for reference bit streams spatially adjacent to each bit stream, and the optimum bit stream is decoded to generate decoded data on a block-by-block basis.

11 citations

Proceedings ArticleDOI
01 Sep 2009
TL;DR: A novel power allocation scheme is presented that results in efficient cooperative multiple-input multiple-output (MIMO) communication and obtains an increased channel capacity as compared to cooperative scheme with conventional equal power allocation and non-cooperative scheme.
Abstract: Cooperative communication achieves diversity through spatially separated cooperating nodes, which are battery powered in most applications. Therefore the energy consumption must be minimized without compromising the transmission quality (bit error rate). In this context, we present a novel power allocation scheme that results in efficient cooperative multiple-input multiple-output (MIMO) communication. Considering channel path loss, the total transmission energy is distributed between the source and the relay nodes. The energy distribution ratio between the relay and direct link is optimized such that the quality of received signal is maintained with minimum total transmission energy consumption. We calculate the energy distribution ratio analytically and verified it through computer simulation. With the new power allocation scheme, the system also obtains an increased channel capacity as compared to cooperative scheme with conventional equal power allocation and non-cooperative scheme. Optimal relay positioning with proposed energy allocation scheme is explored to maximize the capacity.

11 citations

Journal ArticleDOI
TL;DR: Simulation results show that the channel estimation and sequence detection performance can be significantly improved by employing the CS-based channel estimation method and the sequence detectionperformance measured by a bit error ratio.
Abstract: Since wireless optical communication (WOC) systems can offer several potential advantages over their radio frequency counterparts, there has been a growing interest in WOC systems. Influenced by the complicated optical propagation environment, there exists diffuse propagation phenomena. In order to eliminate the effect of multipath propagation caused by diffuse reflection, much attention should be concentrated on the channel estimation in diffuse WOC systems. This paper focuses on the complementary sequences (CSs) for estimating a channel impulse response in WOC systems. Based on the "two-sided" training sequences (a preamble and a postamble sequence are included in the data frame), this paper studies the channel estimation in WOC systems. Further, a simple expression for Cramer-Rao bound (CRB) is proposed to evaluate the two-sided channel estimation errors. By minimizing the CRB, the CS-based channel estimation method is proposed. Moreover, the sequence detection performance measured by a bit error ratio is also investigated. Simulation results show that the channel estimation and sequence detection performance can be significantly improved by employing the CS-based channel estimation.

11 citations

Proceedings ArticleDOI
11 May 2011
TL;DR: In this paper, a relay-assisted optical PPM-OIDMA system is designed to alleviate the degrading effects of atmospheric turbulence, cooperative relay technique is adopted by OIDMA for achieving spatial diversity and robust transmission performance, and extrinsic information transfer (EXIT) charts are analyzed.
Abstract: In this paper, we illustrate our attempt in an effective method of free space optical (FSO) communications. Firstly, a pulse-position modulated (PPM) optical interleave-division multiple-access (OIDMA) system is designed. Secondly, to alleviate the degrading effects of atmospheric turbulence, cooperative relay technique is adopted by OIDMA for achieving spatial diversity and robust transmission performance. Thirdly, to study the convergence behavior of the proposed relay-assisted optical PPM-OIDMA system, extrinsic information transfer (EXIT) charts are analyzed. By deriving the trajectories of the exchanged extrinsic information from EXIT charts, the time of iterations required for convergence can be easily predicted. The effects of scintillation, thermal noise, background noise and multi-user interference have been taken into consideration.

11 citations

Proceedings ArticleDOI
24 Jul 2012
TL;DR: The performance of wireless communications with adaptive modulation and coding in vehicular scenarios were compared against rigid transmission techniques and performance measure of Bit Error Rate and Packet Error Rate were used to provide understanding of the overall picture.
Abstract: Various means of modern transports have already taken the initiative to incorporate computing and communication technology. This cross field area is coined as intelligent transportation systems (ITS). Transport systems of the future require fast and precise monitoring to ensure safety of such systems is guaranteed. Thus, the communication aspect demands seamless and minimal error whilst delivering vital data. However, the dynamic surroundings always post a challenge to wireless communications, taking account into a myriad of interference such as multipath fading, shadowing, dispersing and path loss. Furthermore, there is also case of mobility. In this paper, the performance of wireless communications with adaptive modulation and coding in vehicular scenarios were compared against rigid transmission techniques. Simulations were conducted over different mobility channel models against Signal-to-Noise ratio (SNR) to provide thorough analysis. Performance measure of Bit Error Rate (BER) and Packet Error Rate (PER) were used to provide understanding of the overall picture.

11 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023601
20221,440
20211,433
20201,901
20192,153
20182,095