ds cdma
RSS ds cdmaDS-CDMA: The Technology of Choice for UWB
White Paper DS-CDMA offers the highest aggregate Mbps/m2 data rates because its CDMA codes are designed from the ground up to support "multi-user" which in this case, means multiple overlapping uncoordinated networks - like two wireless home theater systems... [10 Apr 2008]
OFDM, DS-CDMA, and MC-CDMA Systems With Phase Noise and Frequency Offset Effects
White Paper We focus our work on DS-CDMA (IS95, UMTS, Cdma2000) and OFDM (IEEE802.11a, HiperlanII, DVB-T). The case of MC-CDMA is analysed. This paper analyses the effects of either a frequency offset or a phase noise process on the performances of different... [01 Aug 2004]
DS-CDMA Receiver With Sigma-Delta Modulation Encoding
White Paper In this paper, a new direct-sequence code-division-multiple-access (DS-CDMA) receiver with very simple architecture is proposed. The new design is based on sigma-delta (ZA) modulation encoding and hence it is named as ZA-CDMA receiver. [24 Jul 2004]
BER Performance of 2D-Rake Receivers in DS-CDMA Over Frequency-Selective, Slow Rayleigh Fading Channels
White Paper This paper extends the method that has been proposed in the literature for calculating the bit error probability of two-dimensional (2D) Rake receivers in asynchronous direct sequence code-division multiple access (DS-CDMA) over flat, slow... [18 Oct 2005]
A Low-Power DS-CDMA RAKE Receiver Utilizing Resource Allocation Techniques
White Paper This paper presents architectural and implementation innovations made to realize a self-contained front-end processor for any DS-CDMA-based system. At the heart of the ASIC is a highly flexible RAKE processing engine that utilizes a unique resource... [02 Aug 2007]
Optimal Static Pricing of Reverse-Link DS-CDMA Multiclass Traffic
White Paper Direct-sequence code-division multiple-access (DS-CDMA) is a solution implemented in these systems but, due to a limited radio spectrum and the growing number of demanding applications, it seems likely that congestion will still be a problem. [06 Oct 2005]
Reducing Dynamic Power Consumption in Next Generation DS-CDMA Mobile Communication Receivers
White Paper This paper explores the architectural design-space and methodologies for reducing the dynamic power dissipation in the Direct Sequence Code Division Multiple Access (DS-CDMA) downlink RAKE receiver. Reduction of the power consumption in portable... [06 Oct 2005]
Nonlinear Multiuser Precoding for Downlink DS-CDMA Systems Over Multipath Fading Channels
White Paper This paper proposes a Transmitter (Tx)-based nonlinear decorrelating interference cancellation method, Tomlinson-Harashima precoding (THP), to combat multiple access interference (MAI) for the downlink of Direct Sequence Code Division Multiple... [06 Oct 2005]
CSMAC: A Novel DS-CDMA Based MAC Protocol for Wireless Sensor Networks
White Paper This paper proposes CSMAC (CDMA Sensor MAC), novel self-organizing, location-aware media-access control (MAC) protocol for DS-CDMA based sensor networks for applications such as battlefield surveillance that feature higher traffic and stringent... [19 Jan 2006]
Space-Time Block Coding for Single-Carrier Block Transmission DS-CDMA Downlink
White Paper The combination of space-time block coding (STBC) and direct-sequence code-division multiple access (DS-CDMA) has the potential to increase the performance of multiple users in a cellular network. To tackle this MUI problem in the downlink, two... [26 Jul 2005]
SINR Maximizing Space-Time Filtering for Asynchronous DS-CDMA
White Paper Direct Sequence Code Division Multiple Access (DS-CDMA) is a core technology for wireless access that is proposed for future Generation (3G) mobile and personal communication systems. This paper considers space-time one shot single user receivers... [10 Nov 2006]
Experimental Evaluation of Combined Effect of Coherent Rake Combining and SIR-Based Fast Transmit Power Control for Reverse Link of DS-CDMA Mobile Radio
White Paper The combined effect of coherent Rake combining using the Weighted MultiSlot Averaging (WMSA) channel estimation filter and closed-loop fast Transmit Power Control (TPC) in the 4.096 Mchip/s Direct Sequence Code Division Multiple Access (DS-CDMA... [10 Nov 2006]
An Investigation on the Benefits of DS-CDMA in Fibre Supported mm-wave Radio Systems Supporting Flexible Capacity Reconfiguration
White Paper This paper proposes an investigation on the benefits and usability of direct sequence code division multiple access (DS-CDMA) techniques in FSMS where the base stations transmit on the same wavelength. [26 Jul 2005]
Blind Multi-User Equalisation for a Dispersive DS-CDMA Downlink Under Carrier Frequency Offset Conditions
White Paper This paper addresses blind multiuser detection in a DS-CDMA downlink channel in the presence of carrier frequency offset. The synchronous users are separated by re-establishing orthogonality of their spreading sequences in a shared equaliser at the... [07 Feb 2006]
Analytic Forward Link Performance of Pilot-Aided Coherent DS-CDMA Under Correlated Rician Fading
White Paper This paper presents a methodology for analyzing the forward link performance of a pilot-aided coherent DS-CDMA system under correlated Rician fading. In the forward link of a CDMA system, orthogonal modulation is usually used to minimize the self... [10 Nov 2006]
