Data transmission method for a mobile communication system
First Claim
Patent Images
1. A mobile communication system comprising:
- a transmitting station; and
a receiving station,wherein said transmitting station comprises;
an encoder which encodes a transmit signal; and
a modulator which modulate the transmit signal output from the encoder, separates the modulated transmit signal into M units of modulated signals (2≦
M), andan operation unit which multiplies M units of modulated signals separated and output from said modulator by a complex matrix consisting of M×
L units of elements, and performs beam forming of the M units of modulated signals;
a plurality of antennas which transmit L units of beam formed transmit signals (2≦
L), andwherein said receiving station comprises;
a plurality of antennas which respectively receive the signals transmitted from said plurality of antennas of said transmitting station;
a Multiple-Input Multiple-Output (MIMO) receiver which separates said plurality of signals from the signals input from said plurality of antennas;
a demodulator which demodulates the plurality of signals output from said MIMO receiver; and
a decoder which decodes said plurality of demodulated signals.
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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.
18 Citations
9 Claims
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1. A mobile communication system comprising:
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a transmitting station; and a receiving station, wherein said transmitting station comprises; an encoder which encodes a transmit signal; and a modulator which modulate the transmit signal output from the encoder, separates the modulated transmit signal into M units of modulated signals (2≦
M), andan operation unit which multiplies M units of modulated signals separated and output from said modulator by a complex matrix consisting of M×
L units of elements, and performs beam forming of the M units of modulated signals;a plurality of antennas which transmit L units of beam formed transmit signals (2≦
L), andwherein said receiving station comprises; a plurality of antennas which respectively receive the signals transmitted from said plurality of antennas of said transmitting station; a Multiple-Input Multiple-Output (MIMO) receiver which separates said plurality of signals from the signals input from said plurality of antennas; a demodulator which demodulates the plurality of signals output from said MIMO receiver; and a decoder which decodes said plurality of demodulated signals. - View Dependent Claims (2, 3, 4)
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5. A transmitting station which transmits data to a receiving station having a plurality of antennas, said transmitting station comprising:
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an encoder which encodes a transmit signal; a modulator which modulates the transmit signal output from the encoder, and separates the modulated transmit signal into M units of modulated signals (2≦
M);an operation unit which multiplies M units of modulated signals separated and output from said modulator by a complex matrix consisting of M×
L units of elements, and performs beam forming of the M units of modulated signals; andL units of antennas which transmit L units of beam formed transmit signals (2≦
L). - View Dependent Claims (6, 7, 8)
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9. A transmitting station for transmitting data to a receiving station having a plurality of antennas, said transmitting station comprising:
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a modulator which modulates a transmit signal output which is encoded from an encoder; an operation unit which multiples M(2≦
M) units of the modulated transmit signal and output from said modulator by a complex matrix consisting of M×
L(2≦
L) units of elements, and performs beam forming of the M units of the modulated transmit signal; anda plurality of antennas which transmit L units of beam formed transmit signals (2≦
L).
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Specification
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- Resources
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Current AssigneeGodo Kaisha IP Bridge 1 (IP Bridge, Inc.)
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Original AssigneeHitachi, Ltd.
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InventorsYano, Takashi, Tamaki, Satoshi, Hanaoka, Seishi, Kato, Takeshi
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Primary Examiner(s)Trinh, Sonny
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Application NumberUS12/068,681Publication NumberTime in Patent Office1,450 DaysField of Search455/101, 455/91, 455/102, 455/103, 455/132, 455/137, 455/140, 455/269, 455/272, 455/279.1, 370/328, 370/334, 370/310US Class Current455/101CPC Class CodesH04B 7/0615 of weighted versions of sam...H04B 7/0617 for beam formingH04B 7/0669 using different channel cod...H04B 7/0848 Joint weightingH04L 1/0003 by switching between differ...H04L 1/0009 by adapting the channel cod...H04L 1/005 Iterative decoding, includi...H04L 1/0061 Error detection codesH04L 1/0066 Parallel concatenated codesH04L 1/06 using space diversityH04L 1/16 in which the return channel...H04L 1/1845 Combining techniques, e.g. ...H04L 2001/0096 Channel splitting in point-...H04W 16/28 using beam steering
