SPATIAL PILOT STRUCTURE FOR MULTI-ANTENNA WIRELESS COMMUNICATION
First Claim
1. A method of transmitting a pilot in a wireless communication system, comprising:
- generating a first layer pilot for a single layer transmission;
repeating the first layer pilot across subbands of a first OFDM symbol;
repeating offset from the first layer pilot of the first OFDM symbol the first layer pilot across subbands of an adjacent second OFDM symbol; and
transmitting the first and second OFDM symbols in the single layer transmission.
1 Assignment
0 Petitions
Accused Products
Abstract
Spatial pilot to support MIMO receivers in a multi-antenna and multi-layer transmission communication system. A first layer pilot for a single layer transmission is repeated across subbands in a first OFDM symbol and the first layer pilot is also repeated offset from the first OFDM symbol in an adjacent second OFDM symbol. Additional transmission layers may also be transmitted each include a separate pilot generated and repeated in the first symbol and repeated offset form the separate pilot in an adjacent second symbol. The first and second OFDM symbols are then transmitted and received to characterize the receive channels.
-
Citations
35 Claims
-
1. A method of transmitting a pilot in a wireless communication system, comprising:
-
generating a first layer pilot for a single layer transmission; repeating the first layer pilot across subbands of a first OFDM symbol; repeating offset from the first layer pilot of the first OFDM symbol the first layer pilot across subbands of an adjacent second OFDM symbol; and transmitting the first and second OFDM symbols in the single layer transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An apparatus in a wireless communication system, comprising:
-
a pilot generator operative to generate at least one pilot based on a number of layers of transmission, each of the at least one pilot being repeated across subbands of a first OFDM symbol and further being repeated offset from others of the at least one pilot of the first OFDM symbol across subbands of an adjacent second OFDM symbol; and a plurality of transmitter units operative to transmit each of the first and second OFDM symbols in a respective number of layer transmission via a plurality of transmit antennas. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An apparatus in a wireless communication system, comprising:
-
means for generating a first layer pilot for a single layer transmission; means for repeating the first layer pilot across subbands of a first OFDM symbol; means for repeating offset from the first layer pilot of the first OFDM symbol the first layer pilot across subbands of an adjacent second OFDM symbol; and means for transmitting the first and second OFDM symbols in the single layer transmission. - View Dependent Claims (25, 26, 27)
-
-
28. A method of performing channel estimation in a wireless communication system, comprising:
-
obtaining, via a plurality of receive antennas, received symbols each including a first layer pilot with adjacent ones of the received symbols including the first layer pilot offset in the subbands from each other; and processing the received symbols based on the first layer pilot to obtain estimates of a plurality of channels between the plurality of transmit antennas and the plurality of receive antennas. - View Dependent Claims (29, 30, 31)
-
-
32. An apparatus in a wireless communication system, comprising:
-
a plurality of receiver units operative to provide received symbols each including a first layer pilot with adjacent ones of the received symbols including the first layer pilot offset in the subbands from each other; and a channel estimator operative to process the received symbols based on the first layer pilot to obtain estimates of a plurality of channels between the plurality of transmit antennas and the plurality of receive antennas. - View Dependent Claims (33, 34, 35)
-
Specification