Hybrid ultrawideband modulations compatible for both coherent and transmit-reference receivers
(2007) In IEEE Transactions on Wireless Communications 6(7). p.2551-2559- Abstract
- This paper considers signaling schemes for heterogeneous ultrawideband communications networks that contain both coherent (rake) and transmitted-reference (TR) receivers. While coherent receivers are capable of receiving TR signals, they do so with a 3 dB penalty, because they cannot make use of the energy invested into the reference pulse. We propose a new signaling scheme that avoids this drawback, by encoding redundant information on the reference pulse. The resulting scheme does not affect the operation of a TR receiver, while recovering the 3 dB penalty and furthermore providing an additional 1.7 dB coding gain to a coherent uncoded binary scheme. This can be explained by interpreting the scheme as a trellis-coded modulation. We also... (More)
- This paper considers signaling schemes for heterogeneous ultrawideband communications networks that contain both coherent (rake) and transmitted-reference (TR) receivers. While coherent receivers are capable of receiving TR signals, they do so with a 3 dB penalty, because they cannot make use of the energy invested into the reference pulse. We propose a new signaling scheme that avoids this drawback, by encoding redundant information on the reference pulse. The resulting scheme does not affect the operation of a TR receiver, while recovering the 3 dB penalty and furthermore providing an additional 1.7 dB coding gain to a coherent uncoded binary scheme. This can be explained by interpreting the scheme as a trellis-coded modulation. We also provide an alternative implementation that can be viewed as a recursive systematic convolutional encoder. Combining this version further with a simple forward error correction encoder results in a concatenated code that can be decoded iteratively, providing a bit-error rate of 10(-3) at 2.8 dB signal-to-noise ratio in additive white Gaussian noise. The convergence behavior of this iterative code is analyzed by using extrinsic information transfer charts. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/645748
- author
- Zhao, Shiwei ; Orlik, Philip ; Molisch, Andreas LU ; Liu, Huaping and Zhang, Jinyun
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- transmit-reference, convolutional code, recursive systematic, iterative decoding, coherent rake, EXIT chart, ultrawideband
- in
- IEEE Transactions on Wireless Communications
- volume
- 6
- issue
- 7
- pages
- 2551 - 2559
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- wos:000247984000025
- scopus:34547394207
- ISSN
- 1536-1276
- DOI
- 10.1109/TWC.2007.05892
- language
- English
- LU publication?
- yes
- id
- 13e3ba6a-e11a-46a2-9a4c-9aee9cace51d (old id 645748)
- date added to LUP
- 2016-04-01 16:46:42
- date last changed
- 2022-03-15 02:49:55
@article{13e3ba6a-e11a-46a2-9a4c-9aee9cace51d,
abstract = {{This paper considers signaling schemes for heterogeneous ultrawideband communications networks that contain both coherent (rake) and transmitted-reference (TR) receivers. While coherent receivers are capable of receiving TR signals, they do so with a 3 dB penalty, because they cannot make use of the energy invested into the reference pulse. We propose a new signaling scheme that avoids this drawback, by encoding redundant information on the reference pulse. The resulting scheme does not affect the operation of a TR receiver, while recovering the 3 dB penalty and furthermore providing an additional 1.7 dB coding gain to a coherent uncoded binary scheme. This can be explained by interpreting the scheme as a trellis-coded modulation. We also provide an alternative implementation that can be viewed as a recursive systematic convolutional encoder. Combining this version further with a simple forward error correction encoder results in a concatenated code that can be decoded iteratively, providing a bit-error rate of 10(-3) at 2.8 dB signal-to-noise ratio in additive white Gaussian noise. The convergence behavior of this iterative code is analyzed by using extrinsic information transfer charts.}},
author = {{Zhao, Shiwei and Orlik, Philip and Molisch, Andreas and Liu, Huaping and Zhang, Jinyun}},
issn = {{1536-1276}},
keywords = {{transmit-reference; convolutional code; recursive systematic; iterative decoding; coherent rake; EXIT chart; ultrawideband}},
language = {{eng}},
number = {{7}},
pages = {{2551--2559}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Transactions on Wireless Communications}},
title = {{Hybrid ultrawideband modulations compatible for both coherent and transmit-reference receivers}},
url = {{http://dx.doi.org/10.1109/TWC.2007.05892}},
doi = {{10.1109/TWC.2007.05892}},
volume = {{6}},
year = {{2007}},
}