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Methods and apparatus for improved utilization of air link resources in a wireless communications system

A technology of wireless terminals and time-frequency resources, which is applied in the field of improving the use of air link resources and devices in wireless communication systems, and can solve problems such as channel roughness and performance loss

Active Publication Date: 2013-07-24
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coarse and poor sampling of the channel leads to performance loss

Method used

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  • Methods and apparatus for improved utilization of air link resources in a wireless communications system
  • Methods and apparatus for improved utilization of air link resources in a wireless communications system
  • Methods and apparatus for improved utilization of air link resources in a wireless communications system

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Embodiment Construction

[0026] figure 1 is a diagram of an exemplary wireless communication system 100 in accordance with various embodiments. Exemplary wireless communication system 100 is, for example, a multiple-access Orthogonal Frequency Division Multiplexing (OFDM) wireless communication system including a base station using multiple transmit antenna elements and supporting superimposed signaling in the downlink. Various new methods are implemented to facilitate channel estimation.

[0027] The exemplary wireless communication system 100 includes a plurality of base stations (base station 1 102, ..., base station N 104), each having a corresponding wireless coverage area (cell 1 114, ..., cell N 116). Multi-sector base stations are also used in some embodiments. The base stations (102, 104) are coupled to a network node 106 (eg, a router) by network links (108, 110), respectively. Network node 106 is coupled to other network nodes, such as other routers, base stations, AAA nodes, home agent ...

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PUM

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Abstract

The present invention describes methods and apparatus for improving the utilization of air link resources in a wireless communications system, e.g., an OFDM MIMO system, including a base station with multiple transmit antennas. Superposition signaling in the downlink is employed. The superimposed signal includes a first transform result signal and a second lower power signal. The first transform result signal is generated from a first signal, which uses position modulation, e.g., including null components and high power non-null components. Different components of the first transform result signal are directed to different transmit antennas. The first transform result signal communicates information to a first wireless terminal, e.g., a weak receiver. The non-null received elements of the first transform result signal are utilized by a second wireless terminal, e.g., a superior receiver, as pilots to determine a channel estimate. The second wireless terminal uses the determined channel estimate to demodulate received second signals.

Description

[0001] This application is a divisional application of the application number 200880017430.7 and the title of the invention "Method and device for improving the use of air link resources in a wireless communication system" submitted on November 25, 2009. [0002] related application [0003] This application claims priority to US Provisional Patent Application S.N. 60 / 940,660, filed May 29, 2007, which is assigned to the assignee of the present application and is hereby expressly incorporated herein by reference. technical field [0004] The present invention relates to wireless communication methods and apparatus, and in particular, the present invention relates to methods and apparatus for improving the use of air link resources in a wireless communication system, wherein the wireless communication system includes a unit with multiple transmit antennas communication equipment. Background technique [0005] In block-hopping OFDM such as the 802.20 standard with MIMO, suppo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/02H04L25/02H04L27/26H04B7/06
CPCH04B1/713H04L27/2604H04W52/28H04L25/4902H04L25/0202H04L5/023H04B7/068H04B7/0691Y02B60/50H04W52/325H04L1/06Y02D30/70
Inventor T·理查森金辉R·拉罗亚厉隽怿
Owner QUALCOMM INC