An investigation on capacity versus guard-bands in the TDD mode of UMTS

Harald Haas; Steve McLaughlin; Gordon J R Povey

doi:10.1109/VETECF.2000.886134

An investigation on capacity versus guard-bands in the TDD mode of UMTS

Harald Haas, Steve McLaughlin, Gordon J R Povey

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Citations (Scopus)

Abstract

The UMTS terrestrial radio access (UTRA) is composed of a frequency division duplex (UTRA-FDD) mode and a time division duplex (UTRA-TDD) mode. In UTRA-TDD the uplink and downlink are on the same carrier frequency This creates additional interference scenarios, to be precise: MS <----> MS and BS <----> BS interference. Since power leakage between adjacent carriers cannot be avoided this inherent property of TDD has an impact on adjacent channel interference (ACI) and thus on cell capacity. The power leakage results from transmitter mask imperfections and non-ideal receiver filters. From interference power measurements using a 7th and a 9th order butterworth receiver filter the relationship between carrier spacing and adjacent channel interference power ratio (ACIR) is established. This relationship is used to find the best carrier spacing in UTRA-TDD considering several cell deployment scenarios. It is found that the ACIR must be greater than 30 dB, but the capacity gains from an ACIR greater than 40 dB converge rapidly.

Original language	English
Title of host publication	52nd IEEE Vehicular Technology Conference, 2000
Publisher	IEEE
Pages	1820-1824
Number of pages	5
Volume	4
ISBN (Print)	0-7803-6507-0
DOIs	https://doi.org/10.1109/VETECF.2000.886134
Publication status	Published - 2000
Event	52nd IEEE Vehicular Technology Conference - Boston, United States Duration: 24 Sept 2000 → 28 Sept 2000

Conference

Conference	52nd IEEE Vehicular Technology Conference
Abbreviated title	VTC 2000-Fall
Country/Territory	United States
City	Boston
Period	24/09/00 → 28/09/00

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10.1109/VETECF.2000.886134

Cite this

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title = "An investigation on capacity versus guard-bands in the TDD mode of UMTS",

abstract = "The UMTS terrestrial radio access (UTRA) is composed of a frequency division duplex (UTRA-FDD) mode and a time division duplex (UTRA-TDD) mode. In UTRA-TDD the uplink and downlink are on the same carrier frequency This creates additional interference scenarios, to be precise: MS <----> MS and BS <----> BS interference. Since power leakage between adjacent carriers cannot be avoided this inherent property of TDD has an impact on adjacent channel interference (ACI) and thus on cell capacity. The power leakage results from transmitter mask imperfections and non-ideal receiver filters. From interference power measurements using a 7th and a 9th order butterworth receiver filter the relationship between carrier spacing and adjacent channel interference power ratio (ACIR) is established. This relationship is used to find the best carrier spacing in UTRA-TDD considering several cell deployment scenarios. It is found that the ACIR must be greater than 30 dB, but the capacity gains from an ACIR greater than 40 dB converge rapidly.",

author = "Harald Haas and Steve McLaughlin and Povey, {Gordon J R}",

note = "INSPEC Accession Number: 6880127; 52nd IEEE Vehicular Technology Conference, VTC 2000-Fall ; Conference date: 24-09-2000 Through 28-09-2000",

year = "2000",

doi = "10.1109/VETECF.2000.886134",

language = "English",

isbn = "0-7803-6507-0",

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TY - GEN

T1 - An investigation on capacity versus guard-bands in the TDD mode of UMTS

AU - Haas, Harald

AU - McLaughlin, Steve

AU - Povey, Gordon J R

N1 - INSPEC Accession Number: 6880127

PY - 2000

Y1 - 2000

N2 - The UMTS terrestrial radio access (UTRA) is composed of a frequency division duplex (UTRA-FDD) mode and a time division duplex (UTRA-TDD) mode. In UTRA-TDD the uplink and downlink are on the same carrier frequency This creates additional interference scenarios, to be precise: MS <----> MS and BS <----> BS interference. Since power leakage between adjacent carriers cannot be avoided this inherent property of TDD has an impact on adjacent channel interference (ACI) and thus on cell capacity. The power leakage results from transmitter mask imperfections and non-ideal receiver filters. From interference power measurements using a 7th and a 9th order butterworth receiver filter the relationship between carrier spacing and adjacent channel interference power ratio (ACIR) is established. This relationship is used to find the best carrier spacing in UTRA-TDD considering several cell deployment scenarios. It is found that the ACIR must be greater than 30 dB, but the capacity gains from an ACIR greater than 40 dB converge rapidly.

AB - The UMTS terrestrial radio access (UTRA) is composed of a frequency division duplex (UTRA-FDD) mode and a time division duplex (UTRA-TDD) mode. In UTRA-TDD the uplink and downlink are on the same carrier frequency This creates additional interference scenarios, to be precise: MS <----> MS and BS <----> BS interference. Since power leakage between adjacent carriers cannot be avoided this inherent property of TDD has an impact on adjacent channel interference (ACI) and thus on cell capacity. The power leakage results from transmitter mask imperfections and non-ideal receiver filters. From interference power measurements using a 7th and a 9th order butterworth receiver filter the relationship between carrier spacing and adjacent channel interference power ratio (ACIR) is established. This relationship is used to find the best carrier spacing in UTRA-TDD considering several cell deployment scenarios. It is found that the ACIR must be greater than 30 dB, but the capacity gains from an ACIR greater than 40 dB converge rapidly.

U2 - 10.1109/VETECF.2000.886134

DO - 10.1109/VETECF.2000.886134

M3 - Conference contribution

SN - 0-7803-6507-0

VL - 4

SP - 1820

EP - 1824

BT - 52nd IEEE Vehicular Technology Conference, 2000

PB - IEEE

T2 - 52nd IEEE Vehicular Technology Conference

Y2 - 24 September 2000 through 28 September 2000

ER -

An investigation on capacity versus guard-bands in the TDD mode of UMTS

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