Method and apparatus for transmitting data with time diversity and/or time-frequency diversity, and pattern-generating method to be used in the same
AssigneeLG Electronics Inc.
InventorHyun Soo Ko
Life of this patent
Estimating the term…
Abstract
A method and apparatus for transmitting data having time diversity and data having time-frequency diversity, and a pattern generating method for the same are disclosed. The apparatus enables Tx data to have time diversity or time frequency diversity using a predetermined pattern multiplied by Tx data of a time domain or Tx data of time and frequency domains. The apparatus makes a cyclic delay diversity (CDD) scheme to have the diversity of time and frequency domains, and may acquire an additional diversity gain by a combination of the above-mentioned methods.
Claims20
A method for transmitting data in a wireless communication multi-antenna system, the method comprising:
- a) generating time-axis patterns for varying time-axis channel characteristics of transmission signals of each multi-antenna;
- b) multiplying sequential signals contained in the time-axis patterns by time-axis sequential data of the transmission signals of the multi-antennas, and generating a data stream having time diversity;
- and
- c) transmitting the generated data stream.
A method for transmitting data in a wireless communication multi-antenna system, the method comprising:
- a) generating time and frequency-axes patterns for varying time and frequency-axes channel characteristics of transmission signals of each multi-antenna;
- b) mapping the time and frequency-axes patterns to time and frequency-axes data of the transmission signals of the multi-antennas, multiplying the time and frequency-axes patterns by the time and frequency-axes data, and generating a data stream having time-frequency diversitie;
- and
- c) transmitting the generated data stream.
A method for transmitting data in a wireless communication multi-antenna system, the method comprising:
- a) processing a data stream transmitted over each multi-antenna to have different phase delays in a frequency domain;
- b) multiplying the processed data stream by an exponential function having a specific exponent which is proportional to time and has no connection with a frequency;
- and
- c) transmitting the multiplied data stream.
A method for generating a pattern used to generate a data stream having time diversity in a wireless communication system which transmits data in units of a data stream having a predetermined time-axis length over a multi-antenna, the method comprising:
- receiving the time-axis length of the data stream and a number of the multi-antennas;
- and
- generating patterns, which have a length equal to the time-axis length of the data stream and which include code signals, a number of the code signals is same to the number of the multi-antennas,
- wherein when extracting patterns from the generated patterns, and when the extracted patterns has an maximum even length equal to or less than a length of the patterns, the extracted patterns are composed of orthogonal codes orthogonal to each other.
A method for transmitting data using a transmission end of a communication system, the method comprising:
- a) setting transmission power ratios of each multi-antenna to have different transmission power ratios at every transmission time units;
- and
- b) multiplying weights assigned to the each multi-antenna to have the transmission power ratios by transmission data of the each multi-antenna at every transmission time units, and transmitting the multiplied result.
A method for generating a pattern used to generate a data stream having time-frequency diversity in a wireless communication system which transmits data in units of a data stream having a predetermined time-axis length and frequency-axis length over a multi-antenna, the method comprising:
- receiving the time-axis length and the frequency-axis length of the data stream, and a number of the multi-antennas;
- and
- generating patterns, which have a time-axis length and a frequency-axis length equal to the time-axis length and the frequency-axis length of the data stream, and which include code signals, a number of the code signals is same to the number of the multi-antennas, and which vary time and frequency-axes channel characteristics of the data stream.
An apparatus for transmitting data in a wireless communication multi-antenna system, the apparatue comprising:
- a pattern generator for generating patterns to vary time-axis channel characteristics of transmission signals of each multi-antenna;
- a multiplier for multiplying sequential signals of the patterns generated by the pattern generator by time-axis sequential data of the transmission signals of the each multi-antenna, and generating a data stream having time diversity;
- and
- a transmitter for transmitting the generated data stream.
An apparatus for transmitting data in a wireless communication multi-antenna system, the apparatus comprising:
- a pattern generator for generating time and frequency-axes patterns to vary time and frequency-axes channel characteristics of transmission signals of each multi-antenna;
- a multiplier for mapping the time and frequency-axes patterns to time and frequency-axes data of the transmission signals of the multi-antennas, multiplying the time and frequency-axes patterns by the time and frequency-axes data, and generating a data stream having time-frequency diversity;
- and
- a transmitter for transmitting the data stream generated by the multiplier.
An apparatus for transmitting data in a wireless communication multi-antenna system, the apparatus comprising:
- a delay unit for processing data stream of each multi-antenna to have different phase delays in a frequency domain;
- a multiplier for multiplying the data stream by an exponential function having a specific exponent, the specific exponent is proportional to time and has no connection with a frequency;
- and
- a transmitter for transmitting the multiplied data stream.
Dependencies are inferred from the claim text.