Results 111 to 120 of about 2,268 (161)
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IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005
Our topic is channel equalizer quantization for a cellular handset. We answer questions regarding quantization of variables internal to the equalizer using some estimated bounds and simulation. This includes the catastrophic event of breakdown due to a roundoff-induced singularity in Cholesky factorization.
Thomas A. Sexton +5 more
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Our topic is channel equalizer quantization for a cellular handset. We answer questions regarding quantization of variables internal to the equalizer using some estimated bounds and simulation. This includes the catastrophic event of breakdown due to a roundoff-induced singularity in Cholesky factorization.
Thomas A. Sexton +5 more
openaire +2 more sources
Comparison of CS-CDMA and MC-CDMA : BER and PAPR
MILCOM 2008 - 2008 IEEE Military Communications Conference, 2008In this paper, a cyclic prefix code division multiple access (CP-CDMA) system with the use of comb spectrum (CS) code, so called CS-CDMA, is described and a comparison between the CS-CDMA and the Multi-carrier code division multiple access (MC-CDMA) is implemented in terms of the bit error rate (BER) performance and peak to average power ratio (PAPR ...
null Hongbing Cheng +2 more
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On Asymptotic Efficiency for Asynchronous CDMA
2007 41st Annual Conference on Information Sciences and Systems, 2007We consider asynchronous CDMA systems and analyze their performances in terms of asymptotic efficiency when linear receivers are employed and the system becomes overloaded. We show that in such systems, differently from synchronous systems, linear detectors can be asymptotically efficient and, specifically, that the MMSE detector is asymptotically ...
ROMANO, Gianmarco +3 more
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Frequency coordination between CDMA and non-CDMA systems
Proceedings of 1995 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Conjunction with INTER COMM'95), 2002Mutual interference between non-CDMA (FM and TDMA) subscriber stations (SS) and CDMA base stations (BS), as well as interference between CDMA SS and non-CDMA BS are investigated. The noise figure is used as a measure of degradation of the receiver performance.
S. Soliman, C. Wheatley
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CDMA with Partitioned Spreading
IEEE Communications Letters, 2007An enhancement to code-division multiple access (CDMA) is proposed whereby the signature sequences are partitioned into sections, which are interleaved before transmission. A multistage receiver successively forms soft-bit estimates based on the received sections, which are used to reduce the interference in subsequent stages via signal cancellation ...
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Hybrid ISMA/CDMA and CDMA/ISMA protocols for IWCC
Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications, 2002This paper presents a novel multiple access scheme, which is a combination of inhibit sense multiple access (ISMA) and code division multiple access (CDMA), for the indoor wireless computer communications (IWCC). This new multiple access scheme is called hybrid ISMA/CDMA protocol.
F. Harmsze, R. Prasad
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OCDD/CDMA: a new DS/CDMA with orthonormal code diversity detection
IEEE Transactions on Communications, 2001Summary: The paper presents a new spread spectrum communication system called orthonormal code diversity detection (OCDD)/CDMA system based on the novel concept of orthonormal-basis diversity, which is a generalization of the existing spread spectrum diversity concepts such as path diversity and frequency diversity.
Byoung-Hoon Kim, Byeong Gi Lee
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Performance of VSG-CDMA and MC-CDMA in multirate systems
IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202), 2002The performance of two multirate schemes in DS/CDMA systems, variable spreading gain (VSG-CDMA) and multicode (MC-CDMA) are compared. We first present the signal model for a multirate DS/CDMA system. Then, the performance in terms of asymptotic multiuser efficiency (AME), near-far resistance (NFR), and BER are evaluated.
null Zihua Guo, K.B. Letaief
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2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications, 2006
As spectrum spreading and CDMA proved themselves as very efficient in radio communication CDMA application in optical communication seamed to be reasonable as well. Research in this field started two decades ago or so and is still flourishing. In this tutorial paper - after giving a brief listing of relevant concepts in optical communications ...
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As spectrum spreading and CDMA proved themselves as very efficient in radio communication CDMA application in optical communication seamed to be reasonable as well. Research in this field started two decades ago or so and is still flourishing. In this tutorial paper - after giving a brief listing of relevant concepts in optical communications ...
openaire +1 more source