METHOD AND APPARATUS FOR UPLINK SIGNAL TRANSMISSION AND CHANNEL ESTIMATION IN WIRELESS ACCESS NETWORK
First Claim
1. A method, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, wherein the network device has a plurality of transmitting antennas, and the method comprises the following steps:
- m. transmitting multipath subcarrier modulated symbols via the plurality of transmitting antennas, wherein, subcarrier sets used by at least two transmitting antennas are different.
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Accused Products
Abstract
The present invention provides a new method and apparatus, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, and the corresponding method and apparatus for channel estimation in its uplink counterpart device, wherein, a plurality of network device comprise one or more multi-antenna network devices, at least one of the multi-antenna network device transmits multipath subcarrier modulated symbols via a plurality of transmitting antennas configured for itself, wherein, at least two transmitting antennas use different subcarrier sets, but share one pilot pattern, wherein, pilot pattern used by each network device is different from the pilot pattern used by any other network device. The present invention not only can fully utilize the frequency diversity introduced by the plurality of transmitting antennas, but also can guarantee a relative high antenna power gain and save as much time-frequency resource cost caused by pilot signal as possible.
30 Citations
26 Claims
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1. A method, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, wherein the network device has a plurality of transmitting antennas, and the method comprises the following steps:
m. transmitting multipath subcarrier modulated symbols via the plurality of transmitting antennas, wherein, subcarrier sets used by at least two transmitting antennas are different. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8-10. -10. (canceled)
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11. A method, in an uplink counterpart device of a network device of a wireless access network, for performing channel estimation, wherein, the method comprises the following steps:
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A. parsing a pilot signal from an uplink signal received from the network device, based on a pilot pattern preassigned to the plurality of transmitting antennas of the network device; B. performing the channel estimation for the uplink channel between the network device and the uplink counterpart device according to the parsed pilot signal, the obtained channel estimation results being used for parsing the subsequent signals.
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12. A first transmitting device, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, wherein, the network device has a plurality of transmitting antennas, and the first transmitting device comprises:
a second transmitting means, configured to transmit multipath subcarrier modulated symbols via the plurality of transmitting antennas, wherein, subcarrier sets used by at least two transmitting antennas are different. - View Dependent Claims (14, 15, 23)
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13. (canceled)
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16-21. -21. (canceled)
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22. A channel estimation device, in an uplink counterpart device of a network device of a wireless access network, wherein, the device comprises:
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a pilot parsing means, configured to parse a pilot signal from an uplink signal received from the network device, based on a pilot pattern preassigned to the plurality of transmitting antennas of the network device; a processing means, configured to perform the channel estimation for the uplink channel between the network device and the uplink counterpart device according to the parsed pilot signal, the obtained channel estimation results being used for parsing the subsequent signals. - View Dependent Claims (24)
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25. A method of performing uplink communication between a plurality of network devices and their common uplink counterpart device in a multi-carrier based wireless access network, wherein the plurality of network devices comprises one or more multi-antenna network devices, wherein at least one multi-antenna network device transmits multipath subcarrier modulated symbols via a plurality of transmitting antennas configured for itself, wherein subcarrier sets used by at least two transmitting antennas are different.
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26-27. -27. (canceled)
Specification