In this paper, the adaptive equalization techniques are used to transmit data through a communication channel. Because the signal can not be demodulate perfectly at the output of a communication system. However, in practically, all the channels are non ideal and noisy in nature. So, to recover the original signal after demodulation, equalizers minimize the error between the original transmitted...

This paper focuses on the implementation and performance analysis of adaptive switching between STBC and SFBC OFDM systems [1].Here in this paper we proposed an adaptive transmission technique for MIMO OFDM systems using adaptive equalization algorithms (ZF,MMSE) where the channel response are unknown a priori and time variant. In this paper two selection criteria, correlation of the channel an...

This paper focuses on the equalization of block transmissions with zero pad (ZP). If the channel impulse response length does not exceed the ZP length, it is possible to construct zero-forcing equalizers (ZFEs). Improved performance may be achieved using a minimummean squared error (MMSE) equalizer. However, these equalizers are computationally intensive when a time-domain implementation is use...

A low-power architecture for phase-splitting passband equalizer (PSPE) is proposed in this paper. Carrierless AM/PM (CAP) transmission scheme, which is a standard for numerous broadband communication systems including ATM-LAN networks, employs PSPE at the receiving end to combat channel distortion and crosstalk. The conventional PSPE requires two independent adaptive lters that form the in-phas...

A new adaptive MIMO channel equalizer is proposed based on adaptive generalized decision-feedback equalization and ordered-successive interference cancellation. The proposed equalizer comprises equal-length subequalizers, enabling any adaptive filtering algorithm to be employed for coefficient updates. A recently proposed computationally-efficient recursive least-squares algorithm based on dich...

The latest advances inWavelength Division Multiplexing (WDM) technology are making it possible to build all-optical transparent WDM networks, which are expected to be able to satisfy the rapid growth of today’s capacity demand. However, the transparency of such networks makes them highly vulnerable to deliberate attacks, specifically targeting the physical layer. Physical-layer attacks, such as...

This thesis deals with the problem of combining equalization with decoding for high data ratebandwidth-efficient transmissions over frequency-selective channels. Specifically, we focus on Turbo-Equalization which establishes an exchange of soft information between the equalizer and the decoderin an iterative manner. We first consider MAP turbo-equalizers which rely on trellis-based ...