Theoretical analysis of the orthogonality factor in WCDMA downlinks

K A Hamdi

doi:10.1109/TWC.2009.081101

Theoretical analysis of the orthogonality factor in WCDMA downlinks

Research output: Contribution to journal › Article › peer-review

Abstract

Wideband code-division multiaccess (WCDMA) downlink transmission is prone to self interference caused by the loss of orthogonality between the spreading codes due to multipath fading. The degree of loss of orthogonality in downlink WCDMA is usually measured in terms of the orthogonality factor (OF) which is directly related to the level of intra-cell interference. This paper presents accurate theoretical analysis of the OF over generalized fading channels. New exact expressions of the average OF are derived for full and partial RAKE receivers over arbitrarily correlated multipath fading channels.

Original language	English
Article number	5336759
Pages (from-to)	5394-5399
Number of pages	6
Journal	Wireless Communications, IEEE Transactions on
Volume	8
Issue number	11
DOIs	https://doi.org/10.1109/TWC.2009.081101
Publication status	Published - Nov 2009

Keywords

broadband networks
code division multiple access
fading channels
interference (signal)
multipath channels
radio receivers
RAKE receivers
WCDMA downlink transmission
intra-cell interference
multipath fading channels
orthogonality factor
spreading codes
wideband code-division multiaccess downlink transmission
Downlink
Fading
Interference
Land mobile radio cellular systems
Loss measurement
Multiaccess communication
Multipath channels
Propagation losses
Random variables
Reactive power
Code division multiaccess
land mobile radio cellular systems
multiuser channels.

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10.1109/TWC.2009.081101

Cite this

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title = "Theoretical analysis of the orthogonality factor in WCDMA downlinks",

abstract = "Wideband code-division multiaccess (WCDMA) downlink transmission is prone to self interference caused by the loss of orthogonality between the spreading codes due to multipath fading. The degree of loss of orthogonality in downlink WCDMA is usually measured in terms of the orthogonality factor (OF) which is directly related to the level of intra-cell interference. This paper presents accurate theoretical analysis of the OF over generalized fading channels. New exact expressions of the average OF are derived for full and partial RAKE receivers over arbitrarily correlated multipath fading channels.",

keywords = "broadband networks, code division multiple access, fading channels, interference (signal), multipath channels, radio receivers, RAKE receivers, WCDMA downlink transmission, intra-cell interference, multipath fading channels, orthogonality factor, spreading codes, wideband code-division multiaccess downlink transmission, Downlink, Fading, Interference, Land mobile radio cellular systems, Loss measurement, Multiaccess communication, Multipath channels, Propagation losses, Random variables, Reactive power, Code division multiaccess, land mobile radio cellular systems, multiuser channels.",

author = "Hamdi, {K A}",

year = "2009",

month = nov,

doi = "10.1109/TWC.2009.081101",

language = "English",

volume = "8",

pages = "5394--5399",

journal = "Wireless Communications, IEEE Transactions on",

issn = "1536-1276",

publisher = "IEEE",

number = "11",

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T1 - Theoretical analysis of the orthogonality factor in WCDMA downlinks

AU - Hamdi, K A

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N2 - Wideband code-division multiaccess (WCDMA) downlink transmission is prone to self interference caused by the loss of orthogonality between the spreading codes due to multipath fading. The degree of loss of orthogonality in downlink WCDMA is usually measured in terms of the orthogonality factor (OF) which is directly related to the level of intra-cell interference. This paper presents accurate theoretical analysis of the OF over generalized fading channels. New exact expressions of the average OF are derived for full and partial RAKE receivers over arbitrarily correlated multipath fading channels.

AB - Wideband code-division multiaccess (WCDMA) downlink transmission is prone to self interference caused by the loss of orthogonality between the spreading codes due to multipath fading. The degree of loss of orthogonality in downlink WCDMA is usually measured in terms of the orthogonality factor (OF) which is directly related to the level of intra-cell interference. This paper presents accurate theoretical analysis of the OF over generalized fading channels. New exact expressions of the average OF are derived for full and partial RAKE receivers over arbitrarily correlated multipath fading channels.

KW - broadband networks

KW - code division multiple access

KW - fading channels

KW - interference (signal)

KW - multipath channels

KW - radio receivers

KW - RAKE receivers

KW - WCDMA downlink transmission

KW - intra-cell interference

KW - multipath fading channels

KW - orthogonality factor

KW - spreading codes

KW - wideband code-division multiaccess downlink transmission

KW - Downlink

KW - Fading

KW - Interference

KW - Land mobile radio cellular systems

KW - Loss measurement

KW - Multiaccess communication

KW - Multipath channels

KW - Propagation losses

KW - Random variables

KW - Reactive power

KW - Code division multiaccess

KW - land mobile radio cellular systems

KW - multiuser channels.

U2 - 10.1109/TWC.2009.081101

DO - 10.1109/TWC.2009.081101

M3 - Article

SN - 1536-1276

VL - 8

SP - 5394

EP - 5399

JO - Wireless Communications, IEEE Transactions on

JF - Wireless Communications, IEEE Transactions on

IS - 11

M1 - 5336759

ER -

Theoretical analysis of the orthogonality factor in WCDMA downlinks

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Keywords

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