Pre-rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel

Shunsuke Imada, Tomoaki Ohtsuki

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Since Ultra Wideband Impulse Radio (UWB-1R) system can resolve many paths and is thus rich in multipath diversity, the use of Rake diversity combining is very effective. In the Rake diversity combining, the bit error rate (BER) is improved with the increase of the number of fingers. The Pre-Rake diversity combining is known as another technique to achieve the performance equivalent to the Rake diversity combining without increasing the receiver complexity. In the Pre-Rake diversity combining, the transmitted signals are scaled and delayed according to the delay and strength of the multipath. In this paper, we propose Pre-Rake diversity combining techniques for UWB systems, All-Pre-Rake (A-Pre-Rake) diversity combining using perfect channel information, Selective-Pre-Rake (S-Pre-Rake) diversity combining using the information on the L strongest paths, and Partial-Pre-Rake (P-Pre-Rake) diversity combining using the information on the first L paths. From the results of our computer simulation for UWB-1R systems in IEEE 802.15 UWB multipath channel model, we show that the proposed Pre-Rake diversity combining techniques are effective for the UWB-IR systems to achieve good error rate performance, while keeping the complexity of the receiver low. We also show that the S-Pre-Rake diversity combining is effective to achieve good error rate performance with less channel information.

Original languageEnglish
Pages (from-to)2193-2199
Number of pages7
JournalIEICE Transactions on Communications
VolumeE88-B
Issue number5
DOIs
Publication statusPublished - 2005

Fingerprint

Multipath propagation
Ultra-wideband (UWB)
Bit error rate
Computer simulation

Keywords

  • Pre-Rake diversity combining
  • Rake diversity combining
  • UWB

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

Pre-rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel. / Imada, Shunsuke; Ohtsuki, Tomoaki.

In: IEICE Transactions on Communications, Vol. E88-B, No. 5, 2005, p. 2193-2199.

Research output: Contribution to journalArticle

@article{0fde7b9ad5634d3abf8547b124c331b7,
title = "Pre-rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel",
abstract = "Since Ultra Wideband Impulse Radio (UWB-1R) system can resolve many paths and is thus rich in multipath diversity, the use of Rake diversity combining is very effective. In the Rake diversity combining, the bit error rate (BER) is improved with the increase of the number of fingers. The Pre-Rake diversity combining is known as another technique to achieve the performance equivalent to the Rake diversity combining without increasing the receiver complexity. In the Pre-Rake diversity combining, the transmitted signals are scaled and delayed according to the delay and strength of the multipath. In this paper, we propose Pre-Rake diversity combining techniques for UWB systems, All-Pre-Rake (A-Pre-Rake) diversity combining using perfect channel information, Selective-Pre-Rake (S-Pre-Rake) diversity combining using the information on the L strongest paths, and Partial-Pre-Rake (P-Pre-Rake) diversity combining using the information on the first L paths. From the results of our computer simulation for UWB-1R systems in IEEE 802.15 UWB multipath channel model, we show that the proposed Pre-Rake diversity combining techniques are effective for the UWB-IR systems to achieve good error rate performance, while keeping the complexity of the receiver low. We also show that the S-Pre-Rake diversity combining is effective to achieve good error rate performance with less channel information.",
keywords = "Pre-Rake diversity combining, Rake diversity combining, UWB",
author = "Shunsuke Imada and Tomoaki Ohtsuki",
year = "2005",
doi = "10.1093/ietcom/e88-b.5.2193",
language = "English",
volume = "E88-B",
pages = "2193--2199",
journal = "IEICE Transactions on Communications",
issn = "0916-8516",
publisher = "Maruzen Co., Ltd/Maruzen Kabushikikaisha",
number = "5",

}

TY - JOUR

T1 - Pre-rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel

AU - Imada, Shunsuke

AU - Ohtsuki, Tomoaki

PY - 2005

Y1 - 2005

N2 - Since Ultra Wideband Impulse Radio (UWB-1R) system can resolve many paths and is thus rich in multipath diversity, the use of Rake diversity combining is very effective. In the Rake diversity combining, the bit error rate (BER) is improved with the increase of the number of fingers. The Pre-Rake diversity combining is known as another technique to achieve the performance equivalent to the Rake diversity combining without increasing the receiver complexity. In the Pre-Rake diversity combining, the transmitted signals are scaled and delayed according to the delay and strength of the multipath. In this paper, we propose Pre-Rake diversity combining techniques for UWB systems, All-Pre-Rake (A-Pre-Rake) diversity combining using perfect channel information, Selective-Pre-Rake (S-Pre-Rake) diversity combining using the information on the L strongest paths, and Partial-Pre-Rake (P-Pre-Rake) diversity combining using the information on the first L paths. From the results of our computer simulation for UWB-1R systems in IEEE 802.15 UWB multipath channel model, we show that the proposed Pre-Rake diversity combining techniques are effective for the UWB-IR systems to achieve good error rate performance, while keeping the complexity of the receiver low. We also show that the S-Pre-Rake diversity combining is effective to achieve good error rate performance with less channel information.

AB - Since Ultra Wideband Impulse Radio (UWB-1R) system can resolve many paths and is thus rich in multipath diversity, the use of Rake diversity combining is very effective. In the Rake diversity combining, the bit error rate (BER) is improved with the increase of the number of fingers. The Pre-Rake diversity combining is known as another technique to achieve the performance equivalent to the Rake diversity combining without increasing the receiver complexity. In the Pre-Rake diversity combining, the transmitted signals are scaled and delayed according to the delay and strength of the multipath. In this paper, we propose Pre-Rake diversity combining techniques for UWB systems, All-Pre-Rake (A-Pre-Rake) diversity combining using perfect channel information, Selective-Pre-Rake (S-Pre-Rake) diversity combining using the information on the L strongest paths, and Partial-Pre-Rake (P-Pre-Rake) diversity combining using the information on the first L paths. From the results of our computer simulation for UWB-1R systems in IEEE 802.15 UWB multipath channel model, we show that the proposed Pre-Rake diversity combining techniques are effective for the UWB-IR systems to achieve good error rate performance, while keeping the complexity of the receiver low. We also show that the S-Pre-Rake diversity combining is effective to achieve good error rate performance with less channel information.

KW - Pre-Rake diversity combining

KW - Rake diversity combining

KW - UWB

UR - http://www.scopus.com/inward/record.url?scp=24144492768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24144492768&partnerID=8YFLogxK

U2 - 10.1093/ietcom/e88-b.5.2193

DO - 10.1093/ietcom/e88-b.5.2193

M3 - Article

VL - E88-B

SP - 2193

EP - 2199

JO - IEICE Transactions on Communications

JF - IEICE Transactions on Communications

SN - 0916-8516

IS - 5

ER -