Multitone-Hopping CDMA Using Feedback-Controlled Hopping Pattern for Decentralized Multiple Access
نویسندگان
چکیده
منابع مشابه
Multitone-Hopping CDMA Using Feedback-Controlled Hopping Pattern for Decentralized Multiple Access
SUMMARY We propose multitone-hopping code-division multiple access (MH-CDMA) using a feedback-controlled hopping pattern (FCHP) (FCHP/MH-CDMA). In the FCHP/MH-CDMA, part of the filter coefficients of an adaptive finite-duration impulse response (FIR) filter receiver are fed back to a transmitter, in which they are used as an updated hopping pattern. Each chip of the updated hopping pattern cons...
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The medium-access control (MAC) protocols for wireless networks proposed or implemented to date based on collision-avoidance handshakes between sender and receiver either require carrier sensing or the assignment of unique codes to nodes to ensure that intended receivers hear data packets without interference from hidden sources. We present and analyze a protocol that we call channel-hopping mu...
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SUMMARY A novel peak-to-average power ratio (PAR) control algorithm for feedback-controlled multitone-hopping code-division multiple access (FC/MH-CDMA) signals is proposed. In FC/MH-CDMA, since each chip consists of plural tones, the energy consumption due to a large PAR is not negligible at the transmitter. The proposed PAR control algorithm iteratively constructs a time-frequency code that a...
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Spectral shaping is one of the primary technical challenges in spectrally constrained multiple access applications. In this paper, we introduce an efficient orthogonal CDMA-based spectral shaping technique. In our approach, termed CodeHopping CDMA, users are allowed to hop between available spreading codes in an orthogonal fashion with different frequencies. We show that code hoping patterns ca...
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A time-hopping modulation format employing impulse signal technology has several features which may make it attractive for multiple-access communications. These features are outlined, an estimate of the multipleaccess capability of a communication system employing this format under ideal propagation conditions is presented, and emerging design issues are described. Time Hopping with Impulses Th...
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ژورنال
عنوان ژورنال: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
سال: 2008
ISSN: 0916-8508,1745-1337
DOI: 10.1093/ietfec/e91-a.12.3723