Results 91 to 100 of about 5,755 (223)
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
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
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
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
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
A Redundant Residue Number System Coded Burst-by-Burst Adaptive Joint-Detection Based CDMA Speech Transceiver [PDF]
, 2006 A burst-by-burst (BbB) adaptive speech transceiver is proposed, which can drop its source coding rate and speech quality under transceiver control in order to invoke a more error resilient modem mode among less favorable channel conditions.
H.T. How +9 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
PERFORMANSI JARINGAN CODE DIVISION MULTIPLE ACCESS (CDMA) MENGGUNAKAN MOBILE PHONE JAMMER
SISTEM Jurnal Ilmu Ilmu Teknik, 2020 The use of communication tools in some places can be disturb to many people, for example in place of worship and a meeting room. It can be prevented by using a device called a mobile phone jammer. Use of Mobile Phone Jammer can jamming the mobile station signals (CDMA and GSM) both uplink and downlink with the workings of the mobile phone jammer ...
openaire +1 more source
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
Journal of Engineering, 2010 Orthogonal multicode direct sequence code division multiple access (DS-CDMA) has the flexibility in offering high data rate services. However, in a frequency-selective fading channel, the bit error rate (BER) performance is severely degraded since the ...
Maha George Zia, Sameer Akram Dawood
doaj +1 more source