Method for assigning channels based on spatial division multiplexing in an orthogonal frequency division multiplexing system with multiple antennas

Patent metadata

Field	Value
Publication number	US-10447437-B2
Application number	US-94514107-A
Country	US
Kind code	B2
Filing date	Nov 26, 2007
Priority date	Nov 13, 2003
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A method for assigning a single frequency sub-channel to a plurality of MSs (Mobile Stations) in an OFDM (Orthogonal Frequency Division Multiplexing) system utilizing SDM (Spatial Division Multiplexing) with multiple transmit/receive antennas. In the method, a BS (Base Station) can effectively assign a pilot channel to estimate a downlink channel. The BS divides the single frequency sub-channel into a plurality of spatial channels, and sequentially assigns the plurality of spatial channels to the MSs having the maximum communication capacity, thereby transmitting signals of the MSs through the single frequency sub-channel.

First claim

What is claimed is:

1. A method for transmitting pilot signals in a communication system supporting a plurality of antennas, the method comprising:
identifying a frequency resource;
identifying N pilot sequences to be assigned to N antenna ports;
assigning the identified N pilot sequences to the N antenna ports; and
transmitting the N pilot sequences through the frequency resource and the N antenna ports,
wherein the N is an integer greater than or equal to 1, and the N pilot sequences are orthogonal sequences,
wherein an element of each pilot sequence to be assigned to a corresponding antenna port is determined according to time, and
wherein the N pilot sequences are identified from predefined L sequences having length L, where L is an integer greater than or equal to 1.

2. A method for receiving pilot signals in a communication system supporting a plurality of antennas, the method comprising:
identifying a frequency resource;
identifying N pilot sequences to be assigned to N antenna ports;
assigning the identified N pilot sequences to the N antenna ports; and
receiving the N pilot sequences through the frequency resource and the N antenna ports,
wherein the N is an integer greater than or equal to 1, and the N pilot sequences are orthogonal sequences, and
wherein an element of each pilot sequence to be assigned to a corresponding antenna port is determined according to time, and
wherein the N pilot sequences are identified from predefined L sequences having length L, where L is an integer greater than or equal to 1.

3. An apparatus for transmitting pilot signals in a communication system supporting a plurality of antennas, the apparatus comprising:
a controller for identifying a frequency resource, identifying N pilot sequences to be assigned to N antenna ports, and assigning the identified N pilot sequences to the N antenna ports; and
at least one antenna port for transmitting the N pilot sequences through the frequency resource,
wherein the N is an integer greater than or equal to 1, and the N pilot sequences are orthogonal sequences,
wherein an element of each pilot sequence to be assigned to a corresponding antenna port is determined according to time, and
wherein the N pilot sequences are identified from predefined L sequences having length L, where L is an integer greater than or equal to 1.

4. An apparatus for receiving pilot signals in a communication system supporting a plurality of antennas, the apparatus comprising:
a controller for identifying a frequency resource, identifying N pilot sequences to be assigned to N antenna ports, and assigning the identified N pilot sequences to the N antenna ports; and
at least one antenna port for receiving the N pilot sequences through the frequency resource,
wherein the N is an integer greater than or equal to 1, and the N pilot sequences are orthogonal sequences,
wherein an element of each pilot sequence to be assigned to a corresponding antenna port is determined according to time, and
wherein the N pilot sequences are identified from predefined L sequences having length L, where L is an integer greater than or equal to 1.

5. The method of claim 1 , wherein the frequency resource is assigned by a base station.

6. The method of claim 1 , wherein the frequency resource is used for a transmission of data.

7. The method of claim 2 , wherein the frequency resource is assigned by a base station.

8. The method of claim 2 , wherein the frequency resource is used for a transmission of data.

9. The apparatus of claim 3 , wherein the frequency resource is assigned by a base station.

10. The apparatus of claim 3 , wherein the frequency resource is used for a transmission of data.

11. The apparatus of claim 4 , wherein the frequency resource is assigned by a base station.

12. The apparatus of claim 4 , wherein the frequency resource is used for a transmission of data.

Assignees

• Kim Eung Sun
• Lee Jong Hyeuk
• Chung Jae Hak
• Kim Ho Jin
• Chun Joo Hwan
• Lee Kyung Chun
• Kim Il Han
• Samsung Electronics Co Ltd
• Korea Advanced Institute Of Science And Tech Kaist

Inventors

• Kim Eung-Sun
• Lee Jong-Hyeuk
• Chung Jae-Hak
• Kim Ho-Jin
• Chun Joo-Hwan
• Lee Kyung-Chun
• Kim Il-Han

Classifications

• H04L1/06 Primary

  using space diversity · CPC title

• H04L5/023

  Multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division multiple access [OFDMA] (multicarrier modulation H04L27/2601) · CPC title

• H04L27/2601

  Multicarrier modulation systems · CPC title

• H04B7/26 Primary

  at least one of which is mobile · CPC title