The Comparison and Performance Evolution of with and Without Rake Receiver in CDMA Technique
نویسنده
چکیده
RAKE receiver is used in CDMA-based (Code Division Multiple Access) systems and can combine multipath components, which are time-delayed versions of the original signal transmission. Combining is done in order to improve the signal to noise ration at the receiver. RAKE receiver attempts to collect the time-shifted versions of the original signal by providing a separate correlation receiver for each of the multipath signals. This can be done due to multipath components are practically uncorrelated from another when their relative propagation delay exceeds a chip period. This paper presents the basics of RAKE receiver technique, implementation, and design in cellular systems. Also the usage of RAKE receiver is introduced in CDMA-based systems such as IS-95 and WCDMA (Wideband Code Division Multiple Access).
منابع مشابه
Joint Closed-Loop Power Control and Base Station Assignment for DS-CDMA Receiver in Multipath Fading Channel with Adaptive Beamforming Method
In this paper, we propose smart step closed-loop power control (SSPC) algorithm and base station assignment based on minimizing the transmitter power (BSAMTP) technique in a direct sequence-code division multiple access (DS-CDMA) receiver in the presence of frequency-selective Rayleigh fading. This receiver consists of three stages. In the first stage, with conjugate gradient (CG) adaptive ...
متن کاملPerformance analysis of CDMA rake receiver with PIC for wireless communications
In this paper, a software wireless communication simulator performed which simulates a Code division Multiple Access (CDMA) as Wireless cellular telephony has been growing at a faster rate than wired-line telephone networks. This growth has also been fueled by the recent improvements in the capacity of wireless links due to the use of multiple access techniques (which allow many users to share ...
متن کاملOn the downlink capacity of TDD CDMA systems using a pre-Rake
The Pre-Rake technique for the downlink transmission in TDD-based CDMA wireless systems has been shown to provide greater capacity and a simpler receiver design at the mobile receiver. Nevertheless this technique is very affected by fast changing channels, since it relies on uplink channel measurements for the downlink transmission. In this paper a semi-analytical approach to the performance, i...
متن کاملP Erformance Analysis of Ds - Cdma Rake Receiver over Awgn Channel for Wireless Communications
In this paper, a software wireless communication simulator performed which simulates a Code division Multiple Access (CDMA) as Wireless cellular telephony has been growing at a faster rate than wired-line telephone networks. This growth has also been fueled by the recent improvements in the capacity of wireless links due to the use of multiple access techniques (which allow many users to share ...
متن کاملPerformance Comparison of Auxiliary Vector and RAKE-MF Receiver for Transport of H.264/AVC Video Over DS-CDMA Wireless Channels
In this paper, we propose a robust transmission technique for packet-based H.264/AVC video transmission over DS-CDMA wireless channels using Auxiliary Vector (AV) and RAKE-MF receivers and confirm the superiority of the AV receiver. AV Filtering is an iterative algorithm that has fast convergence for short data records. In the proposed system, the H.264 video data packets are packetized and tra...
متن کامل