Apparatus and method for transmitting pilot signal in a BWA communication system using transmit antennas
First Claim
1. A method for transmitting reference signals in a Broadband Wireless Access (BWA) communication system including a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers, each of the sub-carriers occupying a sub-frequency domain, the method comprising the steps of:
- transmitting reference signals for identifying the first transmit antenna through a second predetermined number of sub-carriers in a first mini sub-channel, the first mini sub-channel being transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers; and
transmitting reference signals for identifying the second transmit antenna through the second predetermined number of the sub-carriers in a second mini sub-channel, the second mini sub-channel being transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers.
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Accused Products
Abstract
A method and system for transmitting reference signals in a BWA communication system using a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers. Each of the sub-carriers occupies a sub-frequency domain. In the method, reference signals for identifying a first transmit antenna are transmitted through a second predetermined number of sub-carriers in a first mini sub-channel transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers, and reference signals for identifying a second transmit antenna are transmitted through the second predetermined number of the sub-carriers in a second mini sub-channel transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers.
49 Citations
28 Claims
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1. A method for transmitting reference signals in a Broadband Wireless Access (BWA) communication system including a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers, each of the sub-carriers occupying a sub-frequency domain, the method comprising the steps of:
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transmitting reference signals for identifying the first transmit antenna through a second predetermined number of sub-carriers in a first mini sub-channel, the first mini sub-channel being transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers; and
transmitting reference signals for identifying the second transmit antenna through the second predetermined number of the sub-carriers in a second mini sub-channel, the second mini sub-channel being transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for transmitting reference signals in a Broadband Wireless Access (BWA) communication system including a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers, each of the sub-carriers occupying a sub-frequency domain, the method comprising the steps of:
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generating coded symbols by coding information data to be transmitted according to a first predetermined coding scheme;
generating coded symbols to be transmitted through the first transmit antenna and coded symbols to be transmitted through the second transmit antenna by coding the coded symbols according to a second predetermined coding scheme;
inserting reference signals for identifying the first transmit antenna into a second predetermined number of sub-carriers in a first mini sub-channel, the first mini sub-channel being transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers;
inserting reference signals for identifying the second transmit antenna into the second predetermined number of the sub-carriers in a second mini sub-channel, the second mini sub-channel being transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers;
inserting null data into sub-carriers including sub-frequency domains, which are identical to the sub-frequency domains of the sub-carriers for transmitting the reference signals for identifying the second transmit antenna from among sub-carriers excluding the sub-carriers, which transmit the reference signals for identifying the first transmit antenna, in the first mini sub-channel;
inserting null data into sub-carriers including sub-frequency domains, which are identical to the sub-frequency domains of the sub-carriers for transmitting the reference signals for identifying the first transmit antenna from among sub-carriers excluding the sub-carriers, which transmit the reference signals for identifying the second transmit antenna, in the second mini sub-channel;
inserting the coded symbols to be transmitted through the first transmit antenna into sub-carriers using a truncation scheme, which exclude the sub-carriers including the reference signals and the null data in the first mini sub-channel;
inserting the coded symbols to be transmitted through the second transmit antenna into sub-carriers using the truncation scheme, which exclude the sub-carriers including the reference signals and the null data in the second mini sub-channel;
processing signals of the first mini sub-channel to transmit the processed signals through the first transmit antenna; and
processing signals of the second mini sub-channel to transmit the processed signals through the second transmit antenna. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for transmitting reference signals in a Broadband Wireless Access (BWA) communication system using a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers, each of the sub-carriers occupying a sub-frequency domain, the apparatus comprising:
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a first transmitter for transmitting reference signals for identifying the first transmit antenna through a second predetermined number of sub-carriers in a first mini sub-channel, the first mini sub-channel being transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers; and
a second transmitter for transmitting reference signals for identifying the second transmit antenna through the second predetermined number of the sub-carriers in a second mini sub-channel, the second mini sub-channel being transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers. - View Dependent Claims (16, 17, 18, 19, 20)
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21. An apparatus for transmitting reference signals in a Broadband Wireless Access (BWA) communication system using a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers, each of the sub-carriers occupying a sub-frequency domain, the apparatus comprising:
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a first coder for generating coded symbols by coding information data to be transmitted according to a first predetermined coding scheme;
a second coder for coding the coded symbols according to a second predetermined coding scheme in order to generating coded symbols to be transmitted through the first transmit antenna and coded symbols to be transmitted through the second transmit antenna;
a first reference signal sub-carrier inserter for inserting reference signals for identifying the first transmit antenna into a second predetermined number of sub-carriers in a first mini sub-channel, the first mini sub-channel being transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers;
a first sub-carrier mapper for inserting null data into sub-carriers including sub-frequency domains, which are identical to sub-frequency domains of the sub-carriers for transmitting the reference signals for identifying the second transmit antenna from among sub-carriers excluding the sub-carriers, which transmit the reference signals for identifying the first transmit antenna, in the first mini sub-channel, and inserting the coded symbols to be transmitted through the first transmit antenna into sub-carriers using a truncation scheme, which exclude the sub-carriers including the reference signals and the null data in the first mini sub-channel;
a second reference signal sub-carrier inserter for inserting reference signals for identifying the second transmit antenna into the second predetermined number of the sub-carriers in a second mini sub-channel, the second mini sub-channel being transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers;
a second sub-carrier mapper for inserting null data into sub-carriers including sub-frequency domains, which are identical to sub-frequency domains of the sub-carriers for transmitting the reference signals for identifying the first transmit antenna from among sub-carriers excluding the sub-carriers, which transmit the reference signals for identifying the second transmit antenna, in the second mini sub-channel, and inserting the coded symbols to be transmitted through the second transmit antenna into sub-carriers using the truncation scheme, which exclude the sub-carriers including the reference signals and the null data in the second mini sub-channel;
a first transmitter for processing signals of the first mini sub-channel and transmitting the processed signals through the first transmit antenna; and
a second transmitter for processing signals of the second mini sub-channel and transmitting the processed signals through the second transmit antenna. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification