Method for allocating pilots
First Claim
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1. In a wireless communication network, a method for transmitting pilots signals in a sub-frame, the sub-frame including a plurality of symbols, the method comprising:
- at a first frequency band, transmitting from user equipment to a base station a data modulation (DM) pilot signal for use in demodulating data contained in a first symbol and a second symbol of the sub-frame, wherein a frequency band at which the DM pilot signal of the first symbol is transmitted is not overlapped with a frequency band at which the DM pilot signal of the second symbol is transmitted, and a bandwidth of the frequency band at which the DM pilot signal of the first symbol is transmitted is identical to a bandwidth of the frequency band at which the DM pilot signal of the second symbol is transmitted; and
at a second frequency band, transmitting from the user equipment to the base station a channel quality (CQ) pilot signal for use in measuring channel quality associated with at least one symbol of the sub-frame, wherein the CQ pilot signal is transmitted in the last symbol of the sub-frame, wherein the second frequency band is wider than the first frequency band.
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Abstract
There is provided a method for allocating pilots to a sub-frame. The sub-frame includes a plurality of blocks in time domain. The method includes allocating a data demodulation (DM) pilot used for demodulating data to two blocks spaced not contiguous with each other, and allocating a channel quality (CQ) pilot. System capacity can be increased, and degradation of performance incurred by a channel estimation error can be minimized.
21 Citations
18 Claims
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1. In a wireless communication network, a method for transmitting pilots signals in a sub-frame, the sub-frame including a plurality of symbols, the method comprising:
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at a first frequency band, transmitting from user equipment to a base station a data modulation (DM) pilot signal for use in demodulating data contained in a first symbol and a second symbol of the sub-frame, wherein a frequency band at which the DM pilot signal of the first symbol is transmitted is not overlapped with a frequency band at which the DM pilot signal of the second symbol is transmitted, and a bandwidth of the frequency band at which the DM pilot signal of the first symbol is transmitted is identical to a bandwidth of the frequency band at which the DM pilot signal of the second symbol is transmitted; and at a second frequency band, transmitting from the user equipment to the base station a channel quality (CQ) pilot signal for use in measuring channel quality associated with at least one symbol of the sub-frame, wherein the CQ pilot signal is transmitted in the last symbol of the sub-frame, wherein the second frequency band is wider than the first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a wireless communication network, an user equipment comprising:
- a transmitter configured for transmitting pilot signals in a sub-frame, the sub-frame including a plurality of symbols, the transmitter being further configured for;
transmitting at a first frequency band a data modulation (DM) pilot signal for use in demodulating data contained in a first symbol and a second symbol of the sub-frame, wherein a frequency band at which the DM pilot signal of the first symbol is transmitted is not overlapped with a frequency band at which the DM pilot signal of the second symbol is transmitted, and a bandwidth of the frequency band at which the DM pilot signal of the first symbol is transmitted is identical to a bandwidth of the frequency band at which the DM pilot signal of the second symbol is transmitted; and transmitting at a second frequency band a channel quality (CQ) pilot signal for use in measuring channel quality associated with at least one symbol of the sub-frame, wherein the CQ pilot signal is transmitted in the last symbol of the sub-frame, wherein the second frequency band is wider than the first frequency band. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- a transmitter configured for transmitting pilot signals in a sub-frame, the sub-frame including a plurality of symbols, the transmitter being further configured for;
Specification