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Editorial

Jitendra K Tugnait, Hui Liu, Guang Gong, Tongtong Li
2004 EURASIP Journal on Wireless Communications and Networking  
In this special issue, novel techniques on spreading sequences design, space diversity (multiple transmit and receive antennas), time diversity (channel coding, interleaving), and combination of CDMA and  ...  Furthermore, combination of CDMA and OFDM is attracting more and more attention in order to take the advantages of both schemes.  ...  (iv) Gelli, Paura, and Verde propose a novel two-stage blind mul-tiuser detector for quasisynchronous MC-CDMA systems.  ... 
doi:10.1155/s1687147204004001 fatcat:gtvfet3dqrb35gfc7tszzvsjku

Performance of Downlink MC-CDMA with Simple Interference Cancellation [chapter]

Hideki Ochiai, Hideki Imai
2000 Multi-Carrier Spread Spectrum & Related Topics  
The results show that the most significant improvement can be achieved by successive IC with MMSEC, while two-stage reliability-based IC with EGC shows good performance for a correlated fading channel  ...  Simple interference cancellation (IC) schemes employing either equal gain combining (EGC) or minimum mean squire error combining (MM-SEC) are applied to downlink multi-carrier CDMA and compared by computer  ...  In the MC-CDMA system, a detection algorithm of the receiver plays an important role in determining its bit error performance, and various detection schemes for downlink MC-CDMA have been proposed [5,  ... 
doi:10.1007/978-1-4615-4463-0_24 fatcat:lsmpaivlwzaupawwzl664cnedq

A Sdr Platform For Mobile Wi-Fi/3G Umts System On A Dynamic Reconfigurable Architecture

Tughrul Arslan, Ahmet Erdogan, Zong Wang
2009 Zenodo  
Publication in the conference proceedings of EUSIPCO, Glasgow, Scotland, 2009  ...  SYSTEM ARCHITECTURE The two major challenges in SDR are the design of efficient hardware system and the associated software development environment.  ...  Channel coding I/Q mapper Interleaver/Deinterleaver Symbol modulation W-CDMA uplink Rate: 1/2, 1/3 Convolutional (K=9) Turbo (1/3 only, K=4) QPSK 2-stage block interleaver with inter-column  ... 
doi:10.5281/zenodo.41683 fatcat:qfubd54jcvedbd6ocx4uahbdrq

Layered Steered Space–Time-Spreading-Aided Generalized MC DS-CDMA

M. El-Hajjar, O. Alamri, R.G. Maunder, L. Hanzo
2010 IEEE Transactions on Vehicular Technology  
The rest of this paper is organized as follows. In Section II, we present the encoding and decoding algorithms of the novel LSSTS-aided generalized MC DS-CDMA scheme using TD and FD spreading.  ...  Furthermore, after I = 10 decoding iterations and employing an interleaver depth of D int = 160 000 bits, a time-domain spreading factor of N e = 4, and V = 4 subcarriers, the overloaded system supporting  ...  The enlarged channel length causes system burden, which is due to long-channel estimation, i.e., an increase in pilot overhead, a decrease in bandwidth efficiency, and a degradation of system performance  ... 
doi:10.1109/tvt.2009.2027734 fatcat:poxhyedxz5gk5ciwwcv4veuqky

On Analyzing LDPC Codes over Multiantenna MC-CDMA System

S. Suresh Kumar, M. Rajaram
2014 Mathematical Problems in Engineering  
Simulation results show that the coding gain of the proposed QC-LDPC codes is larger than that of the Reed-Solomon codes, and the performance of the multiantenna MC-CDMA system can be greatly improved  ...  In this paper, we propose a simple method to construct a regular quasicyclic low-density parity-check (QC-LDPC) code to improve the transmission performance over the precoded MC-CDMA system with limited  ...  Conflict of Interests The authors declare that there is no conflict of interests regarding the publication of this paper.  ... 
doi:10.1155/2014/652527 fatcat:dwb4x3p22ndqhkqvbu4aemldq4

Minimum Mean-Squared Error Iterative Successive Parallel Arbitrated Decision Feedback Detectors for DS-CDMA Systems

Rodrigo De Lamare, Raimundo Sampaio-Neto
2008 IEEE Transactions on Communications  
Minimum mean-squared error iterative successive parallel arbitrated decision feedback detectors for DS-CDMA systems. IEEE Transactions on Communications. pp. 778-789.  ...  ISSN 0090-6778 https://doi.org/10.Published paper de Lamare, R.C. and Sampaio-Neto, R. (2008) Minimum mean-squared error iterative successive parallel arbitrated decision feedback detectors for DS-CDMA  ...  S UCCESSIVE PARALLEL ARBITRATED DF AND ITERATIVE DETECTION FOR CODED SYSTEMS This section is devoted to the description of the proposed SPA-DF detector and iterative detection schemes for coded systems  ... 
doi:10.1109/tcomm.2008.060209 fatcat:acvkgfk7rnfadbuntik25lqlq4

Minimum Mean Squared Error Iterative Successive Parallel Arbitrated Decision Feedback Detectors for DS-CDMA Systems

Rodrigo De Lamare, Raimundo Sampaio-Neto
2006 2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications  
Article: de Lamare, Rodrigo C. and Sampaio-Neto, Raimundo (2008) Minimum mean-squared error iterative successive parallel arbitrated decision feedback detectors for DS-CDMA systems.  ...  Published paper de Lamare, R.C. and Sampaio-Neto, R. (2008) Minimum mean-squared error iterative successive parallel arbitrated decision feedback detectors for DS-CDMA systems, IEEE Transactions on Communications  ...  S UCCESSIVE PARALLEL ARBITRATED DF AND ITERATIVE DETECTION FOR CODED SYSTEMS This section is devoted to the description of the proposed SPA-DF detector and iterative detection schemes for coded systems  ... 
doi:10.1109/isssta.2006.311774 fatcat:ulwbjddoa5fr7bofyrf7dvhuj4

Iterative (turbo) soft interference cancellation and decoding for coded CDMA

Xiaodong Wang, H.V. Poor
1999 IEEE Transactions on Communications  
In this paper, an iterative receiver structure is proposed for decoding multiuser information data in a convolutionally coded asynchronous multipath DS-CDMA system.  ...  At each iteration, extrinsic information is extracted from detection and decoding stages and is then used as a priori information in the next iteration, just as in Turbo decoding.  ...  Since in practice, most CDMA systems employ error control coding and interleaving, recent work in this area has addressed multiuser detection for coded CDMA systems.  ... 
doi:10.1109/26.774855 fatcat:ul2j4wvvebhdha6zkiitqiliwu

Implementable wireless access for B3G networks. III. Complexity reducing transceiver structures [Topics in Radio Communications]

Mischa Dohler, Stephen McLaughlin, Peter Sweeney, Lajos Hanzo
2007 IEEE Communications Magazine  
which undertook research in Software Based Systems and Networks & Services for future mobile systems.  ...  Fully detailed technical reports on this research are available to Industrial Member Companies of Mobile VCE. 1 In addition to the Wireless Access research stream, two other research streams were established  ...  MC-CDMA SCHEMES FOR NEXT-GENERATION WIRELESS SYSTEMS INTRODUCTION In the context of CDMA communication, there are two fundamental types of spread-spectrum schemes.  ... 
doi:10.1109/mcom.2007.344589 fatcat:xjkmrk2t7ncg7ejq3znt2ihkri

Adaptive feedback equalization receiver for DS-CDMA with turbo coded systems

S. Chompoo, C. Benjangkaprasert, N. Anatrasirichai, K. Ja
2005 The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.  
 In this paper, adaptive equalizer receiver for a turbo code direct sequence code division multiple access (DS-CDMA) by using least mean square (LMS) adaptive algorithm is presented.  ...  decoding process of the system.  ...  System Model The block diagram of the CDMA system model is shown in Fig. 1 . We consider the uplink of a DS-CDMA system with K users.  ... 
doi:10.1109/icact.2005.246143 fatcat:erxba5khmzaddnbh6hxr2e2hse

Minimum Mean-Squared Error Iterative Successive Parallel Arbitrated Decision Feedback Detectors for DS-CDMA Systems [article]

Rodrigo C. de Lamare, Raimundo Sampaio-Neto
2012 arXiv   pre-print
systems with both Viterbi and turbo decoding as well as for uncoded schemes.  ...  In this paper we propose minimum mean squared error (MMSE) iterative successive parallel arbitrated decision feedback (DF) receivers for direct sequence code division multiple access (DS-CDMA) systems.  ...  SUCCESSIVE PARALLEL ARBITRATED DF AND ITERATIVE DETECTION FOR CODED SYSTEMS This section is devoted to the description of the proposed SPA-DF detector and iterative detection schemes for coded systems  ... 
arXiv:1205.4389v1 fatcat:6xljqbvo5vdyrd773aopsrzfme

A Novel Multiuser Detection and Channel Estimation Method for Uplink Communication in MIMO-OFDM IDMA System

2019 VOLUME-8 ISSUE-10, AUGUST 2019, REGULAR ISSUE  
The main objective of this work is to develop a novel approach for multiuser detection and introducing a new architecture of channel estimation.  ...  Hence, in order to overcome these issues, we present a joint approach of multiuser detection where we compute the LLRs, find the Gaussian distribution and measure the mean and variance of this distribution  ...  A Novel Multiuser Detection and Channel Estimation Method for Uplink Communication in MIMO-OFDM IDMA System (a) Development of an uplink IDMA system (b) Presenting the chip-by chip detection model for  ... 
doi:10.35940/ijitee.l1210.10812s19 fatcat:m6a7qmak7ng3lpcxww42d6wps4

Multi-Carrier CDMA using Interference Cancellation [chapter]

J-Y. Baudais, J-F. Hélard, J. Citerne
2000 Multi-Carrier Spread Spectrum & Related Topics  
It is shown that a parallel interference cancellation MMSE scheme with two stages could be a good compromise between performance and complexity.  ...  In this paper, various detection techniques in the synchronous case of a multiuser MC-CDMA system operating in frequency selective Rayleigh channel are compared with respect to the achievable spectral  ...  Besides, it has been shown that a two stage interference cancellation matrix MMSE scheme could be a good compromise between performance and complexity.  ... 
doi:10.1007/978-1-4615-4463-0_29 fatcat:jkbfzfhwqbhidnb5cn27fsbrue

Linear MMSE detection technique for MC-CDMA

J.-F. Hélard, J.-Y. Baudais, J. Citerne
2000 Electronics Letters  
A novel detection technique for MC-CDMA systems based on the MMSE criterion applied per user is presented.  ...  Simulation results in a Rayleigh fading channel show very good performance, mainly for non full load systems.  ...  A performance comparison of two stage parallel interference cancellation systems with the two MMSE techniques versus the number of active users (with E b /N 0 = 8 dB) is presented in Fig. 3 with L c  ... 
doi:10.1049/el:20000532 fatcat:7jcvzdrbhfbrffw3nv7n45qobq

Software-defined-radio-assisted adaptive broadband frequency hopping multicarrier DS-CDMA

Lie-Liang Yang, L. Hanzo
2002 IEEE Communications Magazine  
This article also shows that FH/MC DS-CDMA exhibits a high grade of flexibility in the context of system design and parameter reconfiguration.  ...  In the short term, the proposed FH/MC DS-CDMA scheme could be employed in the existing second-and third-generation CDMA system bands.  ...  Error control: CRC, FEC codes, coding/decoding schemes, coding rate, number of turbo decoding steps, interleaving depth and pattern • Modulation : Modulation schemes, signal constellation, partial response  ... 
doi:10.1109/35.989783 fatcat:bv2tses7sjbk5lh2plvrika4xa
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