Results 91 to 100 of about 6,142 (224)
Sir Syed University Research Journal of Engineering & Technology, 2011 In this research paper the performance of the CDMA system has been analyzed with respect to PAPR (Peak to Average Power Ratio) measurement and its reduction. Simulation results verify that high peaks degrade the performance of CDMA, application of codes reduced high peaks and PAPR is a good measure for CDMA.
Syed Rizwan-ul- Hasan, Shakil Ahmed
openaire +3 more sources
Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS-CDMA Downlink [PDF]
, 2006 In this contribution we investigate both differentially coherent and noncoherent code acquisition schemes in the multiple transmit/receive antenna aided DS-CDMA downlink, when communicating over uncorrelated Rayleigh channels.
Won, S-H., Won, S.H., Hanzo, L.
core
Performance analysis of a 2-D time-wavelength OCDMA wavelength-aware receiver with beat noise [PDF]
, 2006 The effect of beat noise on two-dimensional time-wavelength optical code-division multiple-access systems utilising wavelength-aware receivers is examined. A derivation of a general formula for the bit error probability taking into consideration multiple
Taher Bazan +5 more
core +1 more source
Blind Chip-Rate Equalisation for DS-CDMA Downlink Receiver [PDF]
, 2003 A dispersive channel in the DS-CDMA downlink destroys the orthogonality of the synchronous users' spreading sequences. In this paper, we aim to re-establish this orthogonality blindly by means of a common chip-level equaliser. The adaptation algorithm is
S. Weiss +11 more
core +1 more source
Information, 2015 Multi-user detection is an effective method to reduce multiple access interference in code division multiple access (CDMA) systems. This paper discusses a signal subspace based blind adaptive multiuser detector and a Kalman filtering blind adaptive ...
Liqing Zhou +5 more
doaj +1 more source
Effect of Soft and Softer Handoffs on CDMA System Capacity [PDF]
, 1998 ? The effect of soft and softer handoffs on code-division multiple-access (CDMA) system capacity is evaluated for unsectorized and sectorized hexagonal cells according to an average bit energy-to-interference power spectral density, which corresponds to ...
Steele, R, Lee, CC
core
Fractionally Spread Multicarrier CDMA: A Multiple-Access Scheme for Various Wireless Channels [PDF]
, 2003 In multicarrier code-division multiple-access (MCCDMA) the total system bandwidth is divided into a number of subbands, where each subband may use direct-sequence (DS) spreading and each subband signal is transmitted using a subcarrier frequency. In this
Yang, L-L., Hanzo, L.
core
Differentially Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Assisted Multi-Carrier DS-CDMA Downlink [PDF]
, 2007 We examine both differentially coherent and non-coherent code acquisition schemes designed for the multiple transmit/receive antenna assisted Multi-Carrier (MC)-DS-CDMA downlink, when communicating over uncorrelated Rayleigh channels.
SeungHwan Won +3 more
core +1 more source
Spectral-amplitude encoding CDMA system based on high-speed electronic encoder/ decoder structures
Revista Facultad de Ingeniería Universidad de Antioquia, 2016 A new method for high-speed Code Division Multiple Access (CDMA) systems that lies on the analogue performance of distributed-based transversal filters is proposed.
Jorge Aguilar-Torrentera +3 more
doaj +1 more source
Interference-Mitigating Waveform Design for Next-Generation Wireless Systems [PDF]
, 2006 A brief historical perspective of the evolution of waveform designs employed in consecutive generations of wireless communications systems is provided, highlighting the range of often conflicting demands on the various waveform characteristics.
L. Hanzo, Hanzo, L.
core +1 more source