Method for transmitting common feedback channel and transceiver therefor
View Patent ↗Disclosed is a method for generating feedback signal patterns of common feedback channels using cyclic shift in a multiple access system, and a transceiver therefore. A method for generating feedback signal patterns includes generating first transmission symbols by adding a cyclic prefix to transmission symbols of feedback signals, and generating second and subsequent transmission symbols by cyclically shifting the first transmission symbols and then adding the cyclic prefix.
1. A method for transmitting feedback signals by transmitters in a multiple access system, comprising:
generating first transmission symbols by adding a cyclic prefix to a feedback signal;
generating second and subsequent transmission symbols by further cyclically shifting the feedback signal and then adding a corresponding cyclic prefix; and
transmitting the generated transmission symbols to common feedback channels of an uplink.
2. The method for transmitting feedback signals of claim 1 , wherein the cyclic shift includes:
dividing the feedback signal into a plurality of blocks having a predetermined length;
shifting the feedback signal by one block in one direction; and
moving last blocks of the shifted feedback signal to a front of a corresponding feedback signal.
3. The method for transmitting feedback signals of claim 2 , wherein the length of the block is set to be same as the length of the cyclic prefix.
4. The method for transmitting feedback signals of claim 2 , wherein the cyclic prefix is added in a scheme of copying the last block of the corresponding feedback signal to the front of the corresponding feedback signal.
5. A transmitter for transmitting feedback signals in a multiple access system, comprising:
a feedback pattern generator that cyclically shifts a feedback signal to generate a feedback pattern;
a cyclic prefix adder that adds a cyclic prefix to the generated feedback pattern; and
transmit circuitry that transmits the feedback patterns to which the cyclic prefix is added to common feedback channels,
wherein the feedback pattern generator generates the cyclic prefix to the feedback pattern to generate first transmission symbols, and further cyclically shifts the generated feedback patterns and then adds a corresponding cyclic prefix thereto to generate second and subsequent transmission symbols.
6. The transmitter for transmitting feedback signals of claim 5 , wherein the feedback pattern generator
divides the feedback pattern into a plurality of blocks having a predetermined length, shifts the feedback pattern by one block in one direction, and then moves a last blocks of the shifted feedback pattern to a front of a corresponding feedback pattern, thereby performing the cyclic shift.
7. A transmitter for transmitting feedback signals in a multiple access system, comprising:
a feedback pattern generator that cyclically shifts a feedback signal to generate feedback pattern;
a cyclic prefix adder that adds a cyclic prefix to the generated feedback pattern; and
transmit circuitry that transmits the feedback patterns to which the cyclic prefix is added to common feedback channels, and
a feedback controller that determines whether or not to perform feedback on signals received from another party, and if it is determined that the feedback is needed, it requests the generation of the feedback pattern to the feedback pattern generator.
8. A transmitter for transmitting feedback signals in a multiple access system, comprising:
a feedback pattern generator that cyclically shifts a feedback signal to generate feedback pattern;
a cyclic prefix adder that adds a cyclic prefix to the generated feedback pattern; and
transmit circuitry that transmits the feedback patterns to which the cyclic prefix is added to common feedback channels,
wherein the feedback pattern generator generates the same feedback signal patterns for each cell, and generates the feedback signal patterns for each cell in a scheme of scrambling the feedback signal patterns with different scramble codes for each cell.
9. A transmitter for transmitting feedback signals in a multiple access system, comprising:
a feedback pattern generator that cyclically shifts a feedback signal to generate feedback pattern;
a cyclic prefix adder that adds a cyclic prefix to the generated feedback pattern; and
transmit circuitry that transmits the feedback patterns to which the cyclic prefix is added to common feedback channels,
wherein the feedback pattern generator generates the feedback signal patterns for each cell at a time of using a previously prepared algorithm.