Multiple access capacity of UWB m-ary impulse radio systems with antenna array

• Published in: IEEE transactions on wireless communications Vol. 5; no. 1; pp. 61 - 66
• Main Authors: Tan, S.S., Kannan, B., Nallanathan, A.
• Format: Journal Article
• Language: English
• Published: Piscataway, NJ IEEE 01.01.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Antennas; Applied sciences; Bit error rate; Energy capture; Exact sciences and technology; Fading; Impulses; Infrared radiation; Multipath channels; Multiple access; Pulse modulation; Pulse position modulation; Radio; Radiocommunications; Receivers; Receiving antennas; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Transmitting antennas; Ultra wideband antennas; Performance evaluation; Multiple access; Bit error rate; Information rate; Pulse position modulation; Information transmission; Ultra wide band; M ary modulation; Rake receiver; Numerical simulation; Time hopping communication; Transmission rate; impulse radio; M-ary; Antenna array
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2006.1576528

In this paper, the multiple access capacity of an Mary pulse position modulation (PPM) impulse radio (IR) system with antenna array is analyzed in dense multipath environments. An antenna array with Rake receivers is used to capture the signal energy from multipaths. Multiple access performance of the system is evaluated in terms of number of supported users for a given bit error rate and bit transmission rate with different number of antenna elements and selected paths. Numerical results show that the multiple access capacity of an M-ary IR system can be improved significantly by increasing the number of antenna elements and/or by adding more paths coherently at the receiver.