TW200708144A - Transmit spatial diversity for cellular single frequency networks - Google Patents

Transmit spatial diversity for cellular single frequency networks

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Publication number
TW200708144A
TW200708144A TW095121239A TW95121239A TW200708144A TW 200708144 A TW200708144 A TW 200708144A TW 095121239 A TW095121239 A TW 095121239A TW 95121239 A TW95121239 A TW 95121239A TW 200708144 A TW200708144 A TW 200708144A
Authority
TW
Taiwan
Prior art keywords
streams
benefit
ues
mimo
cell
Prior art date
Application number
TW095121239A
Other languages
Chinese (zh)
Other versions
TWI322632B (en
Inventor
Durga Prasad Malladi
Original Assignee
Qualcomm Inc
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Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of TW200708144A publication Critical patent/TW200708144A/en
Application granted granted Critical
Publication of TWI322632B publication Critical patent/TWI322632B/en

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  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

Multiple-In Multiple-Out (MIMO) techniques are used to increase spectral efficiency of a cellular single frequency network. In some embodiments with single transmit antenna per cell, multiple data streams are transmitted from multiple cells, one data stream per set of transmit antennae. The mapping of streams to antenna sets is permuted in time. In this way, user equipment devices (UEs) at cell edges benefit from MIMO, and UEs near cell centers benefit from high carrier-to-interference (C/I) ratio of the signal. In some embodiments, each stream is concurrently transmitted on base layer of a hierarchically modulated signal from one set, and on enhancement layer of a hierarchically modulated signal from another set. The mapping of sets to streams is permuted in time. The UEs at cell edges benefit from MIMO, and the UEs near cell centers benefit from the high C/I to decode both streams from the base and enhancement layers.
TW95121239A 2005-06-14 2006-06-14 Transmit spatial diversity for cellular single frequency networks TWI322632B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69062205P 2005-06-14 2005-06-14

Publications (2)

Publication Number Publication Date
TW200708144A true TW200708144A (en) 2007-02-16
TWI322632B TWI322632B (en) 2010-03-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
TW95121239A TWI322632B (en) 2005-06-14 2006-06-14 Transmit spatial diversity for cellular single frequency networks

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Country Link
CN (1) CN101238648B (en)
MY (1) MY143501A (en)
TW (1) TWI322632B (en)

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Also Published As

Publication number Publication date
CN101238648A (en) 2008-08-06
TWI322632B (en) 2010-03-21
CN101238648B (en) 2013-03-20
MY143501A (en) 2011-05-31

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