Method and device for transmitting downlink pilot
First Claim
Patent Images
1. A method for transmitting a dedicated pilot, comprising the steps of:
- configuring a dedicated pilot with an orthogonal sequence over a resource for transmission of the dedicated pilot according to a preset mapping rule; and
transmitting the dedicated pilot in a Code Division Multiplexing, CDM, mode or in a hybrid CDM and Frequency Division Multiplexing, FDM, mode,wherein adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;
for a system at a transmission rank of 1 to 4, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;
for a system at a transmission rank of 5 to 8, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;
wherein for a system at the transmission rank of 1 to 4, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences in a frequency order within a system bandwidth;
for a system at the transmission rank of 5 to 8, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences in a frequency order within a system bandwidth.
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Abstract
Disclosed is a method for transmitting a downlink pilot, which serves to solve the problem that the power of Orthogonal Frequency Division Multiplexing (OFDM) symbols is different due to Walsh codes. The method includes: transmitting a dedicated pilot in the Code Division Multiplexing (CDM) approach or in the combination approach of CDM and Frequency Division Multiplexing (FDM); further, in the resources for transmitting the dedicated pilot, configuring an orthogonal resources for the dedicated pilot according to a set mapping rule.
11 Citations
14 Claims
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1. A method for transmitting a dedicated pilot, comprising the steps of:
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configuring a dedicated pilot with an orthogonal sequence over a resource for transmission of the dedicated pilot according to a preset mapping rule; and transmitting the dedicated pilot in a Code Division Multiplexing, CDM, mode or in a hybrid CDM and Frequency Division Multiplexing, FDM, mode, wherein adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences; for a system at a transmission rank of 1 to 4, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;
for a system at a transmission rank of 5 to 8, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;wherein for a system at the transmission rank of 1 to 4, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences in a frequency order within a system bandwidth;
for a system at the transmission rank of 5 to 8, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences in a frequency order within a system bandwidth. - View Dependent Claims (2, 3, 4, 5, 11, 13)
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6. A device for transmitting a dedicated pilot, comprising:
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a configuring unit configured to configure a dedicated pilot with an orthogonal sequence over a resource for transmission of the dedicated pilot according to a preset mapping rule; and a transmitting unit configured to transmit the dedicated pilot processed by the configuring unit in a Code Division Multiplexing, CDM, mode or in a hybrid CDM and Frequency Division Multiplexing, FDM, mode; wherein adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences wherein for a system at a transmission rank of 1 to 4, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;
for a system at a transmission rank of 5 to 8, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences;wherein for a system at the transmission rank of 1 to 4, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences in a frequency order within a system bandwidth;
for a system at the transmission rank of 5 to 8, two adjacent sub-carriers, corresponding to the same port, for transmission of the dedicated pilot have their orthogonal sequences selected from different sets of orthogonal sequences in a frequency order within a system bandwidth. - View Dependent Claims (7, 8, 9, 10, 12, 14)
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Specification