Data transmission method for a mobile communication system

• US 8,626,243 B2
• Filed: 01/23/2012
• Issued: 01/07/2014
• Est. Priority Date: 03/03/2003
• Status: Expired due to Term

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Kato, Takeshi, Yano, Takashi, Tamaki, Satoshi, Hanaoka, Seishi
• Primary Examiner(s): Trinh, Sonny
• Application Number:
  US13/355,609
• Publication Number:
  US 20120120875A1
• Time in Patent Office: 715 Days
• Field of Search: 455/562.1, 455/101, 455/102, 455/103, 455/575.7, 370/310, 370/334
• US Class Current: 455/562.1
• CPC Class Codes: H04B 7/0615 of weighted versions of same signal
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0848 Joint weighting
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/005 Iterative decoding, including iteration between signal detection and decoding operation
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0066 Parallel concatenated codes
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 2001/0096 Channel splitting in point-to-point links
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

This invention provides a mobile communication system which expanded the operation limitation of the heretofore adopted mobile communication systems and improved the spectrum efficiency greatly. A data transmission method for use in the mobile communication system of the present invention includes means for channel pluralizing by which to expand the Shannon limit and means for interference reduction by which to expand the interference limit. More specifically, a transmitting module comprises M units of modulators and L units of transmitting antennas, generates L units of signals by multiplying M units of modulated signals by a complex matrix consisting of M×L units of elements, and transmits the L units of signals from the L units of transmitting antennas.

Claims

1. A communication apparatus comprising:

an encoder;

a modulator which generates a plurality of symbols on the basis of information inputted from the encoder; and

an operation unit which multiplexes the symbols provided serially by the modulator,

wherein the operation unit distributes the symbols into a plurality of signals, performs beam forming on each of the plurality of signals using a different vector, and outputs beam formed signals corresponding to a plurality of antennas for outputting to a wireless network.

2. A communication apparatus comprising:

an encoder;

a modulator which generates a plurality of symbols on the basis of information inputted from the encoder;

a serial-parallel converter which generates a plurality of signals based on the symbols; and

an operation unit which generates a matrix randomly,

wherein the operation unit performs beam forming of the plurality of signals based on the matrix, and outputs beam formed signals corresponding to a plurality of antennas for outputting to a wireless network.

3. An information processing device comprising:

a modulation unit which generates a plurality of modulation symbols;

a conversion unit which converts the modulation symbol into M units of signals (2≦

M);

an operation unit which performs beam forming of the M units of signals by using a complex matrix consisting of M×

L units of elements, and outputs L units of beam formed signals (2≦

L).