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22
The Viterbi algorithm
- Proceedings of the IEEE
, 1973
"... vol. 6, no. 8, pp. 211-220, 1951. [7] J. L. Anderson and J. W..Ryon, “Electromagnetic radiation in accelerated systems, ” Phys. Rev., vol. 181, pp. 1765-1775, 1969. [8] C. V. Heer, “Resonant frequencies of an electromagnetic cavity in an accelerated system of reference, ” Phys. Reu., vol. 134, pp. A ..."
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Cited by 985 (3 self)
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vol. 6, no. 8, pp. 211-220, 1951. [7] J. L. Anderson and J. W..Ryon, “Electromagnetic radiation in accelerated systems, ” Phys. Rev., vol. 181, pp. 1765-1775, 1969. [8] C. V. Heer, “Resonant frequencies of an electromagnetic cavity in an accelerated system of reference, ” Phys. Reu., vol. 134, pp. A799-A804, 1964. [9] T. C. Mo, “Theory of electrodynamics in media in noninertial frames and applications, ” J. Math. Phys., vol. 11, pp. 2589-2610, 1970.
Multi-User Projection Receivers
- IEEE J. Select. Areas Commun
, 1996
"... A new multi-user receiver for synchronous CDMA systems with error control coding is proposed. The receiver achieves interference cancellation by projecting the undesired users onto the space spanned by the desired users' signal vectors. The detector calculates the Least Squares (LS) estimate of ..."
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Cited by 28 (11 self)
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A new multi-user receiver for synchronous CDMA systems with error control coding is proposed. The receiver achieves interference cancellation by projecting the undesired users onto the space spanned by the desired users' signal vectors. The detector calculates the Least Squares (LS) estimate of the interfering users data, that is used to yield an adjusted metric for Maximum-Likelihood Sequence Estimation (MLSE) for the desired users' sequences. Simulation results indicate that close to optimal performance can be achieved when all but one of the users are projected using only a single user decoder for the desired user. Further, an adaptive receiver structure based on the recursive LS update is presented that is well-suited for DSP implementation due to it's computational efficiency. Keywords---synchronous CDMA, multi-user receivers, least means squares (LMS), recursive least means squares (RLS), multiple access, error control coding. I.
A simple figure of merit for evaluating interleaver depth for the land-mobile satellite channel
- IEEE Trans. Commun
, 2001
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Coded Asynchronous CDMA and Its Efficient Detection
- IEEE TRANS. INFORM. THEORY
, 1998
"... In this paper, receiver design and performance analysis for coded asynchronous code-division multiple access (CDMA) systems is considered. The receiver front-end consists of the near--far resistant multiuser detector known as the projection receiver (PR). The PR performs multiple-access interference ..."
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Cited by 4 (0 self)
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In this paper, receiver design and performance analysis for coded asynchronous code-division multiple access (CDMA) systems is considered. The receiver front-end consists of the near--far resistant multiuser detector known as the projection receiver (PR). The PR performs multiple-access interference resolution and is followed by error-control decoding. The output of the projection receiver yields the appropriate metric (i.e., soft information) for decoding of the coded sequences. An expression for the metric is derived that allows the use of a standard sequence decoder (e.g., Viterbi algorithm, M-algorithm) for the error-control code. It is then shown that the metric computer has an elegant adaptive implementation based on an extension of the familiar recursive least squares (RLS) algorithm. The adaptive PR operates on a single sample per chip and achieves a performance virtually identical to the algebraic PR, but with significantly less complexity. The receiver performance is studied ...
Forward link performance of satellite CDMA with linear interference suppression and one-step power control
- IEEE Trans. Wireless Commun
, 2002
"... (CDMA) is a strong candidate for both terrestrial and satellite components of UMTS. The forward-link capacity of a satellite DS-CDMA system with a conventional matched filter (MF) receiver is limited by interference from adjacent beams and possibly overlapping beams from multiple satellites. In this ..."
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Cited by 2 (2 self)
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(CDMA) is a strong candidate for both terrestrial and satellite components of UMTS. The forward-link capacity of a satellite DS-CDMA system with a conventional matched filter (MF) receiver is limited by interference from adjacent beams and possibly overlapping beams from multiple satellites. In this paper, we study the performance of the linear minimum mean squared error (MMSE) receiver for the satellite forward link. System constraints are long propagation delay, which prevents accurate closed-loop power control, and low on-board power consumption, which implies a low received bit energy to noise density ratio at the mobile receiver. We consider a “one-step ” power adjustment algorithm which attempts to compensate for random shadowing and path loss, and compare the associated performance of the MMSE and MF receivers. Dual-satellite diversity is also considered. The effect of code rate on performance is studied through the use of punctured convolutional codes and the evaluation of random coding bounds. Our results indicate that linear MMSE interference suppression can improve the quality of service and increase system capacity significantly. Index Terms—Code-division multiple-access, interference suppression, satellite communications. I.
Integrated error control and power control for DS-CDMA multimedia wireless communications
- IEE Proceedings - Communications
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11. STATEMENT OF THE PROBLEM
, 1972
"... [6] H. Epheser and T. Schlomka, “Flachengrossen und elektrodynamische ..."
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la REPORT SECURITY CLASSIFICATION UNCLASSIFIED
, 1990
"... i1 | i i Form Approved ..."
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