Pre-equalization for MISO DS-UWB systems with pre-Rake combining
نویسندگان
چکیده
منابع مشابه
Pre-rake Diversity with Generalized Orthogonal Codes and Imperfect Channel Conditions for Fdd/ds-cdma Systems
The Pre-Rake diversity combining technique decreases the complexity, size and cost of the mobile unit while achieving the same inter symbol interference (ISI) mitigation effects of conventional Rake receiver for direct sequence code division multiple access (DS-CDMA) systems. The technique is based on preprocessing of signal at the transmitter relying on knowledge of the channel state informati...
متن کاملPerformance Evaluation of Rake and Pre-Rake Receiver for a Wireless DS- CDMA System
A new method to deal with multi path fading environment for DS–CDMA wireless networks has been proposed. Here, depending upon the statistical nature of the channel, signal is transmitted as a sum of various spreaded signals; each one delayed and scaled according to the delay & strengths of the multi paths of the transmitted channel. New method known as Pre-Raking is performed at the transmitted...
متن کاملSpace-Time Pre-RAKE Multiuser Transmitter Precoding for DS/CDMA Systems
A novel linear precoding method that combines Multiuser Interference (MAI) cancellation, pre-RAKE filtering and Transmitter (Tx) antenna diversity is proposed for the downlink of the Code Division Multiple Access (CDMA) channel. It is demonstrated that this method has better performance than single user space-time pre-RAKE precoding with relatively low increase in complexity. In addition, sever...
متن کاملImpact of Timing Jitter on DS-UWB and Hybrid DS-Multiband-UWB Systems with Rake Reception over Multipath Environment
In this paper, the impact of timing jitter in direct sequence ultra wideband (DS-UWB) system is investigated over multipath fading channel. Also, a novel hybrid direct sequence multiband UWB (DS-MBUWB) system is proposed to mitigate the impact of timing jitter. We analyze and compare the system performance for conventional DS-UWB and hybrid DS-MB-UWB with Rake receiver in the presence of timing...
متن کاملPerformance Improvement in Ds-spread Spectrum Cdma Systems Using a Pre- and a Post-rake
The Rake receiver is a well known technique in spread spectrum systems, which is used to obtain signal diversity in multipath environments. In TDD systems, a technique known as pre-Rake has been proposed recently, in which the signal-processing is transferred to the transmitter, and it has been shown that this technique provides a capacity increase in the downlink. In this paper we propose a co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Wireless Communications
سال: 2009
ISSN: 1536-1276
DOI: 10.1109/twc.2009.070947