AbstractField test of space-time (ST) equalizers for combating inter-symbol interference (ISI) at base station, was conducted in microand macro-cell environments in central Tokyo area. Test results indicate that the ST equalizers provide significant better bit error rate (BER) than an array processor alone dose, due to both space and path diversity while suppressing long-delayed path. Furthermo...

A family of sub-optimal Bayesian equalizers is proposed in two versions: feed-forward and decision feedback. We show that this family of equalizers provides a range of gradual choices concerning the tradeoff between equalizer complexity and symbol error rate (SER). We also point out the SER equivalence between the simplest proposed structure (the simplest equalizer of the family) and Wiener lin...

EQUALIZATION Boon Chong Ng David Gesbert Arogyswami Paulraj Information Systems Laboratory Dept. of Electrical Engineering Stanford University, Stanford, CA 94305. ABSTRACT This paper describes a direct equalization approach for channels with some underlying structure. A semi-blind approach is taken here where a small amount of training symbols is available. A family of MMSE equalizers is obtai...

The processing complexity of optimal receivers in frequency selective channels grows exponentially with the channel memory length. Linear receivers, alternatively, offer significantly less complexity with the cost of performance degradation. Such degradation can be due to not fully capturing the inherent frequency diversity or degraded coding gain. In this paper we investigate how effectively t...

A recent approach to understanding the channel equalization problem is based on function approximation theory. From this approach, it is known that the optimal equalizer is nonlinear even for linear channels. Moreover, Volter-ra-based equalizers and decision feedback equalizers (DFE) ooer restricted exibility for representing the nonlinear dis-criminant required in many cases. This fact has mot...

Transmission of high data rate over multipath environment is associated with many wireless applications. However, this transmission results in delay which leads to ISI distortion and causes error. The existing LE MIMO systems such as ZF equalizer used addressing problem reduces the completely but noise amplification. Likewise, MMSE only cannot eliminate ISI. Therefore, paper proposed a hybrid f...

There is a growing demand for higher data rate systems that can function in a highly mobile environment. This mandates the design of communication systems that can function in doubly selective channels. Pulse-shaped multi-carrier modulation schemes prove to be an attractive option for transmission over doubly-dispersive channels. The pulse shapes are designed to yield an inter-symbol/inter-carr...

The turbo equalizers (TEQ) proposed in literature utilize equalizers based on trellis, soft Wiener filters. The resulting complexity of these equalizers is exponential and cubic in terms of the sampled channel impulse response (CIR). The interference cancellation based decision feedback filter based equalizers requires adaptation of two filters simultaneously. In this paper, a low complexity eq...