Abstract: In this paper, the technique of digital down conversion (DDC) and channel equalization in wideband digital array radar (WDAR) are introduced. The analysis about the frequency domain equalization algorithm based on weighted least squares (WLS) is derived in detail at first. Then, an efficient DDC based on polyphase structure with intermediate frequency (IF) bandpass sampling is present...

Multichannel equalization (MCEQ) techniques have been proposed for the inversion of acoustic impulse responses (AIRs) with a wide range of applications such as speech dereverberation. Adaptive MCEQ techniques can address the problem of high computational complexity required for the inversion of high order AIRs using non-adaptive algorithms based on the multiple-input/output inverse theorem (MIN...

This paper proposes per-tone equalization methods for single carrier block transmission with cyclic prefix (SC-CP) systems. Minimum mean-square-error (MMSE) based optimum weights of the per-tone equalizers are derived for SISO (single-input single-output), SIMO (single-input multipleoutput), and MIMO (multiple-input multiple-output) SC-CP systems. Unlike conventional frequency domain equalizati...

The base-band analog processor performs necessary signal processing on the 150 MHz base-band signal in the transmit and receive signal paths for a wide-band wireless local area network. The individual channel characteristics depend on the RF signal fade and interference. Broadcasting to multiple appliances requires channel equalization at the receiver. In the receive (Rx) section, the wide-band...

Abstract In the next generation wireless communication systems, high-speed packet services will be in great demand, and hence error control technique is indispensable. Hybrid automatic repeat request (HARQ) is a well-known important error controlling technique. Joint FDE and inter-chip interference (ICI) cancellation based on the minimum mean square error (MMSE) criterion can achieve frequency ...

It is proposed low-complexity block turbo equalizers for orthogonal frequency-division multiplexing (OFDM) system in a channel. The presented work is based on a soft minimum mean –square error (MMSE) block linear equalizer (BLE) that exploits the banded structure of the frequency –domain channel matrix, as well as a receiver window that enforces this banded structure. This equalization approach...

In this paper, the problem of channel equalization in modified discrete Fourier transform (MDFT)-based filter-bank multicarrier system (FBMC) is addressed. Two different system models based on padding zeros or using cyclic prefix in each transmitted block are presented. The proposed systems utilize IFFT/FFT blocks embedded in an MDFT-FBMC system. In the first one, an equalization block similar ...