US 2004/0174840 A1 · Data transmission method for a mobile communication system

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.

Claims20

Dependent claims

A mobile communication system comprising a transmitting station and a receiving station, said transmitting station comprising:

a plurality of modulators;
an encoder which encodes data to transmit into a code word, separates the code word into a plurality of signals, and outputs the plurality of signals to said plurality of modulators;
an operation unit which performs beam forming of transmit signals modulated by said plurality of modulators in order to transmit the transmit signals from a plurality of antennas;
and
a plurality of antennas, said receiving station comprising:
a plurality of antennas which respectively receive the signals transmitted from said plurality of antennas of said transmitting station;
a MIMO receiver which separates said plurality of signals from the signals input from said plurality of antennas;
a plurality of demodulators which demodulate the plurality of signals output from said MIMO receiver;
and
a decoder which decodes said plurality of demodulated signals.

7 more elements

A transmitting station with a plurality of antennas which transmits data on a plurality of transmission channels to a receiving station with a plurality of antennas, said transmitting station comprising:

a plurality of modulators;
an encoder which encodes data to transmit into a code word, separates the code word into a plurality of signals, and outputs the plurality of signals to said plurality of modulators;
an operation unit which executes arithmetic operation for giving pointing directions of transmit beams to a plurality of transmit signals modulated by said plurality of modulators;
and
the plurality of antennas from which signals output from said operation unit are transmitted to said receiving station.

2 more elements

Dependencies are inferred from the claim text.

Data transmission method for a mobile communication system

Life of this patent

Data transmission method for a mobile communication system

Life of this patent

Abstract

Claims20