Performance of CDMA random access systems with packet combining in fading channels

We analyze the system performance of code-division multiple-access (CDMA) random access systems with linear receivers and packet combing in multipath fading channels. Both slotted and unslotted CDMA systems with random spreading codes are considered. The analysis is based on large systems in which both the offered load and the processing gain tend to infinity but their ratio is fixed. It is relatively easy to characterize the traffic in such large systems, which enables us to derive the system throughput and average delay. From the analysis results, it is observed that multiuser detection and packet combining substantially improve the system performance.

[1]  Vijay K. Bhargava,et al.  Analysis of unslotted direct-sequence spread spectrum multiple access network with packet combining , 1997 .

[2]  Takaya Yamazato,et al.  Throughput analysis of DS/SSMA unslotted ALOHA system with fixed packet length , 1996, IEEE J. Sel. Areas Commun..

[3]  Mohamed-Slim Alouini,et al.  Digital Communication Over Fading Channels: A Unified Approach to Performance Analysis , 2000 .

[4]  Sumit Roy,et al.  Performance of CDMA slotted ALOHA multiple access with multiuser detection , 1999, WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466).

[5]  Yi Sun,et al.  Multiuser detection for packet-switched CDMA networks with retransmission diversity , 2004, IEEE Transactions on Signal Processing.

[6]  S. Wicker.  Error Control Systems for Digital Communication and Storage , 1994 .

[7]  Stephen B. Wicker,et al.  A diversity combining DS/CDMA system with convolutional encoding and Viterbi decoding , 1994, Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications.

[8]  Jamie S. Evans,et al.  Large system performance of linear multiuser receivers in multipath fading channels , 2000, IEEE Trans. Inf. Theory.

[9]  R.D.J. van Nee.  Timing aspects of synchronous CDMA , 1994, 5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Networks - Catching the Mobile Future..

[10]  Dimitri P. Bertsekas,et al.  Data Networks , 1986 .

[11]  Sheldon M. Ross,et al.  Stochastic Processes , 2018, Gauge Integral Structures for Stochastic Calculus and Quantum Electrodynamics.

[12]  David Tse,et al.  Effective interference and effective bandwidth of linear multiuser receivers in asynchronous CDMA systems , 2000, IEEE Trans. Inf. Theory.

[13]  Upamanyu Madhow,et al.  MMSE interference suppression for direct-sequence spread-spectrum CDMA , 1994, IEEE Trans. Commun..

[14]  Vijay K. Bhargava,et al.  Maximum-likelihood decoding and code combining for DS/SSMA slotted ALOHA , 1994, IEEE Trans. Commun..

[15]  Edwin K. P. Chong,et al.  Output MAI distributions of linear MMSE multiuser receivers in DS-CDMA systems , 2001, IEEE Trans. Inf. Theory.

[16]  Yi Sun.  Network diversity of random access slotted CDMA networks , 1999, Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020).

[17]  James S. Lehnert,et al.  Packet throughput in slotted ALOHA DS/SSMA radio systems with random signature sequences , 1992, IEEE Trans. Commun..