US 2014/0153614 A1Published application

Wireless communications apparatus

AssigneeKabushiki Kaisha Toshiba

InventorsSteve Carl Jamieson PARKER, Justin COON

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Abstract

MIMO UWB Communications apparatus is configured to send out a channel estimation sequence comprising a plurality of sequentially transmitted symbols in accordance with a first band hopping sequence, sent from one antenna of the apparatus, while another antenna is transmitting another sequence of channel estimation symbols in accordance with another, complementary band hopping sequence. A legacy device will be capable of synchronising with the channel estimation symbols sent in accordance with the first band hopping sequence, while a MIMO receiver will be able to determine channel estimates for all MIMO channels on the basis of the combined channel estimation transmissions.

Claims12

Dependent claims

Communications apparatus comprising a plurality of antennas suitable for establishing a wideband MIMO communications channel with another communications apparatus, said wideband MIMO communications channel having at least two subbands defined therein with respect to frequency, the communications apparatus being operable,

to transmit from each of said antennas a signal within one or more of said subbands defined in said channel,
to transmit a signal having a frame structure, the frame structure comprising a data portion and a preamble before the data portion, wherein the preamble comprises a channel estimation sequence for use by a receiver in estimating the MIMO communications channel, the channel estimation sequence being modulated onto a plurality of band portions defined in said wideband communications channel,
to transmit said channel estimation sequence from one of said antennas by way of a band hopping sequence between two or more of said subbands, and
to transmit said channel estimation sequence from another of said antennas by way of a second, complementary band hopping sequence between two or more of said subbands.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/175,791Filed 7 Feb 2014
Priority: GB 0625445.220 Dec 2006
Published: 5 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 25/0202
Details ; arrangements for supplying electrical power along data transmission lines: channel estimation
H04B 1/713
Spread spectrum techniques: using frequency hopping
H04B 7/0413
Using two or more spaced independent antennas: mIMO systems
H04L 27/2601
Systems using multi-frequency codes: multicarrier modulation systems

Family

Application11/954,846Continuation · filed 12 Dec 2007
Application13/088,028Continuation · filed 15 Apr 2011
Application13/569,032Continuation · filed 7 Aug 2012
Application14/175,791Continuation
US 2008/0212652 A1Published application
US 2011/0194586 A1Published application
US 2013/0010831 A1Published application
US 9,455,845 B2Related patent
US 2014/0153614 A1This patent

From the US filing history. Foreign family members aren’t listed.

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