DESIGN ASPECTS TO SUPPORT LTE-A DOWNLINK HI-ORDER MIMO

• US 20120087442A1
• Filed: 09/21/2009
• Published: 04/12/2012
• Est. Priority Date: 09/22/2008
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: XU, HUA, MA, JIANGLEI, YU, DONG-SHENG, JIA, MING, BALIGH, MOHAMMADHADI, CALLARD, AARON
• Granted Patent: US 8,315,225 B2
• Time in Patent Office: Days
• US Class Current: 375/299
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0684 using different training sequences per antenna
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

A method of operation of a MIMO transmitter, in a cellular network supporting both legacy standard-compliant mobile terminals and next generation standard-compliant mobile terminals, the method comprising defining a matrix of resource blocks within an information channel of the cellular network, wherein each resource block corresponds to a region of subcarriers of a transmission timeslot at a given frequency subband; assigning a first set of reference signals (RSs) for the legacy standard-compliant mobile terminals to resource blocks at specific locations within the matrix to be transmitted by the MIMO transmitter, the specific locations being defined by, the legacy standard; and assigning a second set of RSs for the next-generation standard-compliant mobile terminals to other resource blocks within the matrix to be transmitted by the MIMO transmitter.

Claims

1. A method of operation of a MIMO transmitter, in a cellular network supporting both legacy standard-compliant mobile terminals and next generation standard-compliant mobile terminals, said method comprising:

defining a matrix of resource blocks within an information channel of said cellular network, wherein each resource block corresponds to a region of subcarriers of a transmission timeslot at a given frequency subband;

assigning a first set of reference signals (RSs) for said legacy standard-compliant mobile terminals to resource blocks at specific locations within said matrix to be transmitted by) said MIMO transmitter, said specific locations being defined by said legacy standard; and

assigning a second set of RSs for said next-generation standard-compliant mobile terminals to other resource blocks within said matrix to be transmitted by said MIMO transmitter.