In this paper, the analog code modulation characteristics of distributed-based transversal filters (DTFs) suitable for use in spectrally encoded CDMA systems are presented. The DTF is verified as an appropriate method to use in high-speed CDMA systems as opposed to previously proposed methods, which are intended for Direct Sequence (DS) CDMA systems. The large degree of freedom of DTF design permits controlling the filter pulse response to generate well specified temporal phase-coded signals. A decoder structure that performs bipolar detection of user subbands giving rise to a Spectral-Amplitude Encoded CDMA system is considered. Practical implementations require truncating the spreading signals by a time window of duration equal to the span time of the tapped delay line. Filter functions are chosen to demodulate the matched channel and achieve improved user interference rejection avoiding the need for transversal filters featuring a large number of taps. As a proof-of-concept of the electronic SAE scheme, practical circuit designs are developed at low speeds (3-dB point at 1 GHz) demonstrating the viability of the proposal.
Jorge AGUILAR-TORRENTERA
Universidad Autónoma de Nuevo León
Gerardo GARCÍA-SÁNCHEZ
Universidad Autónoma de Nuevo León
Ramón RODRÍGUEZ-CRUZ
Universidad Autónoma de Nuevo León
Izzat Z. DARWAZEH
University College London
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Jorge AGUILAR-TORRENTERA, Gerardo GARCÍA-SÁNCHEZ, Ramón RODRÍGUEZ-CRUZ, Izzat Z. DARWAZEH, "Extending Distributed-Based Transversal Filter Method to Spectral Amplitude Encoded CDMA" in IEICE TRANSACTIONS on Electronics,
vol. E101-C, no. 12, pp. 953-962, December 2018, doi: 10.1587/transele.E101.C.953.
Abstract: In this paper, the analog code modulation characteristics of distributed-based transversal filters (DTFs) suitable for use in spectrally encoded CDMA systems are presented. The DTF is verified as an appropriate method to use in high-speed CDMA systems as opposed to previously proposed methods, which are intended for Direct Sequence (DS) CDMA systems. The large degree of freedom of DTF design permits controlling the filter pulse response to generate well specified temporal phase-coded signals. A decoder structure that performs bipolar detection of user subbands giving rise to a Spectral-Amplitude Encoded CDMA system is considered. Practical implementations require truncating the spreading signals by a time window of duration equal to the span time of the tapped delay line. Filter functions are chosen to demodulate the matched channel and achieve improved user interference rejection avoiding the need for transversal filters featuring a large number of taps. As a proof-of-concept of the electronic SAE scheme, practical circuit designs are developed at low speeds (3-dB point at 1 GHz) demonstrating the viability of the proposal.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E101.C.953/_p
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@ARTICLE{e101-c_12_953,
author={Jorge AGUILAR-TORRENTERA, Gerardo GARCÍA-SÁNCHEZ, Ramón RODRÍGUEZ-CRUZ, Izzat Z. DARWAZEH, },
journal={IEICE TRANSACTIONS on Electronics},
title={Extending Distributed-Based Transversal Filter Method to Spectral Amplitude Encoded CDMA},
year={2018},
volume={E101-C},
number={12},
pages={953-962},
abstract={In this paper, the analog code modulation characteristics of distributed-based transversal filters (DTFs) suitable for use in spectrally encoded CDMA systems are presented. The DTF is verified as an appropriate method to use in high-speed CDMA systems as opposed to previously proposed methods, which are intended for Direct Sequence (DS) CDMA systems. The large degree of freedom of DTF design permits controlling the filter pulse response to generate well specified temporal phase-coded signals. A decoder structure that performs bipolar detection of user subbands giving rise to a Spectral-Amplitude Encoded CDMA system is considered. Practical implementations require truncating the spreading signals by a time window of duration equal to the span time of the tapped delay line. Filter functions are chosen to demodulate the matched channel and achieve improved user interference rejection avoiding the need for transversal filters featuring a large number of taps. As a proof-of-concept of the electronic SAE scheme, practical circuit designs are developed at low speeds (3-dB point at 1 GHz) demonstrating the viability of the proposal.},
keywords={},
doi={10.1587/transele.E101.C.953},
ISSN={1745-1353},
month={December},}
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TY - JOUR
TI - Extending Distributed-Based Transversal Filter Method to Spectral Amplitude Encoded CDMA
T2 - IEICE TRANSACTIONS on Electronics
SP - 953
EP - 962
AU - Jorge AGUILAR-TORRENTERA
AU - Gerardo GARCÍA-SÁNCHEZ
AU - Ramón RODRÍGUEZ-CRUZ
AU - Izzat Z. DARWAZEH
PY - 2018
DO - 10.1587/transele.E101.C.953
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E101-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2018
AB - In this paper, the analog code modulation characteristics of distributed-based transversal filters (DTFs) suitable for use in spectrally encoded CDMA systems are presented. The DTF is verified as an appropriate method to use in high-speed CDMA systems as opposed to previously proposed methods, which are intended for Direct Sequence (DS) CDMA systems. The large degree of freedom of DTF design permits controlling the filter pulse response to generate well specified temporal phase-coded signals. A decoder structure that performs bipolar detection of user subbands giving rise to a Spectral-Amplitude Encoded CDMA system is considered. Practical implementations require truncating the spreading signals by a time window of duration equal to the span time of the tapped delay line. Filter functions are chosen to demodulate the matched channel and achieve improved user interference rejection avoiding the need for transversal filters featuring a large number of taps. As a proof-of-concept of the electronic SAE scheme, practical circuit designs are developed at low speeds (3-dB point at 1 GHz) demonstrating the viability of the proposal.
ER -