TY - GEN
T1 - Acquisition performance of multiple user spread ALOHA system employing a Dynamic Digital Matched Filter
AU - Kingsley, J.
AU - Allan, A.
AU - Liyana-Pathirana, R.
PY - 2004
Y1 - 2004
N2 - Spread ALOHA offers both the favourable transmission characteristics of Spread Spectrum transmission and the conceptual simplicity of the ALOHA random access protocol. Moreover, receiver complexity is reduced in comparison to Code Division Multiple Access, as it is only required to demodulate transmissions using a single spreading code. In this paper we develop a MATLAB-Simulink model in order to observe the acquisition performance of a multiple user Spread ALOHA system. The receiver model used is a Dynamic Digital Matched Filter (DMF) with variable effective correlation length. Both the acquisition time and detection probabilities of the Dynamic DMF receiver are measured for different interference levels (numbers of users) and varying effective correlation length. The results are compared to the Conventional DMF. The results indicate a significant performance improvement for longer effective correlation lengths, equal or close to the length of the Pseudo-Noise Code (PN-code) employed in the system. This performance improvement was significant in terms of both probability of detection and mean acquisition time.
AB - Spread ALOHA offers both the favourable transmission characteristics of Spread Spectrum transmission and the conceptual simplicity of the ALOHA random access protocol. Moreover, receiver complexity is reduced in comparison to Code Division Multiple Access, as it is only required to demodulate transmissions using a single spreading code. In this paper we develop a MATLAB-Simulink model in order to observe the acquisition performance of a multiple user Spread ALOHA system. The receiver model used is a Dynamic Digital Matched Filter (DMF) with variable effective correlation length. Both the acquisition time and detection probabilities of the Dynamic DMF receiver are measured for different interference levels (numbers of users) and varying effective correlation length. The results are compared to the Conventional DMF. The results indicate a significant performance improvement for longer effective correlation lengths, equal or close to the length of the Pseudo-Noise Code (PN-code) employed in the system. This performance improvement was significant in terms of both probability of detection and mean acquisition time.
UR - https://www.scopus.com/pages/publications/27944473327
U2 - 10.1109/TENCON.2004.1414699
DO - 10.1109/TENCON.2004.1414699
M3 - Conference Paper
AN - SCOPUS:27944473327
SN - 0780385608
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
SP - C33-C36
BT - IEEE TENCON 2004 - 2004 IEEE Region 10 Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2004 IEEE Region 10 Conference: Analog and Digital Techniques in Electrical Engineering, IEEE TENCON 2004
Y2 - 21 November 2004 through 24 November 2004
ER -