Proceedings Article10.1109/ISSSTA.2002.1048610
Orthogonal code hopping multiplexing for downlink statistical multiplexing
Su-Won Park,Sung Ho Moon,Jae Kyun Kwon,Dan Keun Sung +3 more
- 10 Dec 2002
- Vol. 2, pp 588-592
TL;DR: In this article, three modes of orthogonal code hopping multiplexing (OCHM) are proposed to accommodate more orthogonality downlink channels than orthogons for downlink channel, and they are compared.
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Abstract: For orthogonal downlink and statistical multiplexing, three modes of orthogonal code hopping multiplexing (OCHM) are proposed to accommodate more orthogonal downlink channels than orthogonal codewords for downlink channels, and they are compared. The performance comparison shows that the hybrid mode OCHM outperforms both the division mode and the hopping mode.
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Citations
Limited feedback diversity techniques for correlated channels
David J. Love,Robert W. Heath +1 more
TL;DR: This correspondence addresses the design of limited feedback beamformers when the channel is correlated and employs multiple antennas at the transmitter.
216
Code-Hopping Multiple Access Based on Orthogonal Complementary Codes
TL;DR: Simulation results show that the complementary-coded CHMA with channel coding can provide much higher capacity than complementary- coded code-division multiple access (CDMA) systems in varying operational scenarios and to deal with destructive collisions among spreading codes in CHMA systems.
19
Collision mitigation by log-likelihood ratio (LLR) conversion in orthogonal code-hopping multiplexing
TL;DR: Log-likelihood ratio (LLR) conversion schemes greatly reduce the required SNR in channel decoding even when the perforation probability is high, and several estimation methods are proposed to avoid accurate estimation.
Performance Analysis of Orthogonal Frequency and Code Hopping Multiplexing
TL;DR: The proposed OFCHM scheme for downlink multiplexing to provide efficient support of packet traffic with low/medium data rates in a spread OFDM environment yields a larger overall downlink capacity than a dedicated resource allocation/multiplexing scheme.
13
Adaptive code rate for orthogonal code hopping multiplexing (OCHM) in synchronous downlink
Jae Kyun Kwon,Su-Won Park,Dan Keun Sung,Heesoo Lee +3 more
- 20 Mar 2003
TL;DR: An adaptive code rate control scheme is proposed and the base station adaptively changes the code rate according to traffic environments in order to save power.
References
•Book
Digital communications
Bernard Sklar
- 01 Oct 1987
Abstract: "This is a remarkably comprehensive treatment of the field, covering in considerable detail modulation, coding (both source and channel), encryption, multiple access and spread spectrum. It can serve both as an excellent introduction for the graduate student with some background in probability theory or as a valuable reference for the practicing ommunication system engineer. For both communities, the treatment is clear and well presented."
866
Orthogonal code hopping multiplexing
Su-Won Park,Dan Keun Sung +1 more
TL;DR: An orthogonal code hopping multiplexing scheme is proposed as a statistical multiplexed scheme for an Orthogonal downlink in order to accommodate more orthogona downlink channels than orthogonic codewords for mobile stations, and its performance is evaluated.
44
Performance comparison of orthogonal code hopping multiplexing (OCHM) and HDR schemes in synchronous downlink
Jae Kyun Kwon,Su-Won Park,K.S. Dan,Mun Geon Kyeong +3 more
- 17 Mar 2002
TL;DR: OCHM outperforms HDR in medium and high mobility conditions, while HDR operates better in a low mobility condition, through link-level simulation.
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