Results 81 to 90 of about 23,651 (213)
International Journal of Antennas and Propagation, 2011 We analytically derive the upper bound for the bit error rate (BER) performance of a single user multiple input multiple output code division multiple access (MIMO-CDMA) system employing parity-bit-selected spreading in slowly varying, flat Rayleigh ...
Claude D'Amours, Adel Omar Dahmane
doaj +1 more source
Joint-Detection and Interference Cancellation Based Burst-by-Burst Adaptive CDMA Schemes
, 2002 Spread adaptive quadrature amplitude modulated (AQAM) code-division multiple access (CDMA) is proposed as a powerful means of exploiting the time-variant channel capacity fluctuations of wireless channels.
Hanzo, L., Kuan, E.L., Ng, S.X.
core +1 more source
Path Loss Model Optimization for Code Division Multiple Access (CDMA) System in Malaysia
Modern Applied Science, 2011 تهدف دراسة هذا العمل إلى تطوير نموذج محسّن لفقدان المسار للتغطية الحضرية في نظام الوصول المتعدد بتقسيم الشفرة (CDMA) بناءً على النماذج الحالية والقياسات التجريبية. يتم اختيار نموذج أوكومورا كمرجع لتطوير نموذج فقدان المسار الأمثل بناءً على أصغر خطأ نسبي متوسط مقارنة بفقدان المسار المقاس.
Mardeni Roslee, Yihpey Lee
openaire +1 more source
Theoretical Investigation into Spectral Coexistence of CDMA and TDMA Systems
The Journal of Engineering Research, 2008 The scarcity of available radio spectrum presently limits the extension of modern multimedia systems. This paper presents a theoretical investigation into the possibility of using a frequency overlay of a narrowband Code Division Multiple Access (CDMA ...
A.M. Abbosh, M. A. Shehathah
doaj +1 more source
A comparison of CDMA techniques for third generation mobile radio systems [PDF]
, 1993 A comparison is made between both direct sequence (DS) and frequency hopping (FH) spreading techniques in code division multiple access (CDMA) based upon the stringent requirements of proposed third generation mobile radio systems in Europe.
Beach, MA +4 more
core +2 more sources
System level comparison of FDMA vs. CDMA (under conference guideline constraint) [PDF]
The margin that is required to mitigate the near-far problem in a Code Division Multiple Access (CDMA) mobile satellite system is determined by the radio-propagation model selected, the distribution of the users in clear and shadowed environments, and ...
Renshaw, Ken
core +1 more source
, 2005 —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.
Hanzo, L., Yang, L-L.
core
, 2006 In this contribution, we study a reduced-complexity multiuser detection aided multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) scheme, which employs both time (T)-domain and frequency (F)-domain spreading.
Hanzo, L., Wei, H., Yang, L-L.
core +1 more source
Comparison of FDMA and CDMA for second generation land-mobile satellite communications [PDF]
Code Division Multiple Access (CDMA) and Frequency Division Multiple Access (FDMA) (both analog and digital) systems capacities are compared on the basis of identical link availabilities and physical propagation models.
Lyons, R. G. +2 more
core +1 more source
Dynamical replica theoretic analysis of CDMA detection dynamics
, 2005 We investigate the detection dynamics of the Gibbs sampler for code-division multiple access (CDMA) multiuser detection. Our approach is based upon dynamical replica theory which allows an analytic approximation to the dynamics.
Coolen A C C +10 more
core +1 more source