Method and system of multi-layer beamforming
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-Han Nam, Jianzhong Zhang
Life of this patent
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Abstract
A base station includes a reference signal sequence generator configured to generate a reference signal sequence for a reference signal for each of n antenna ports using one initialization seed with n being a positive integer. The initialization seed is defined as: cinit=(└ns/2┘+1)·(2NIDcell+1)·216+NIDgroup, where ns is a first slot number in a subframe, NIDcell is a cell identifier of the base station, and NIDgroup is a group identifier. The base station also includes a transmit path circuitry configured to transmit a downlink grant and the reference signal. In some embodiments, the group identifier NIDgroup is a one-bit group identifier dynamically indicated in a codepoint in the downlink grant transmitted by the base station.
Claims20
A base station comprising:
- a reference signal sequence generator configured to generate a reference signal sequence for a reference signal for each of n antenna ports using one initialization seed cinit, n being a positive integer,
- wherein the initialization seed is defined as:
- cinit=(└ns/2┘+1)·(2NIDcell+1)·216+NIDgroup,
- where ns is a first slot number in a subframe, NIDcell is a cell identifier of the base station, and NIDgroup is a group identifier;
- and
- a transmit path circuitry configured to transmit a downlink grant and the reference signal.
A method of operating a base station, the method comprising:
- generating, at a reference signal sequence generator, a reference signal sequence for a reference signal for each of n antenna ports using one initialization seed cinit, n being a positive integer,
- wherein the initialization seed is defined as:
- cinit=(└ns/2┘+1)·(2NIDcell+1)·216+NIDgroup,
- where ns is a first slot number in a subframe, NIDcell is a cell identifier of the base station, and NIDgroup is a group identifier;
- and
- transmitting a downlink grant and the reference signal.
A subscriber station comprising:
- a receive path circuitry configured to:
- receive a downlink grant from a base station;
- and
- receive a reference signal generated at the base station using one initialization seed cinit,
- wherein the initialization seed is defined as:
- cinit=(└ns/2┘+1)·(2NIDcell+1)·216+NIDgroup,
- where ns is a first slot number in a subframe, NIDcell is a cell identifier of the base station, and NIDcell is a identifier.
A method of operating a subscriber station, the method comprising:
- receiving a downlink grant from a base station;
- and
- receiving a reference signal generated at the base station using one initialization seed cinit,
- wherein the initialization seed is defined as:
- cinit=(└ns/2┘+1)·(2NIDcell+1)·216+NIDgroup,
- where ns is a first slot number in a subframe, NIDcell is a cell identifier of the base station, and NIDgroup is a group identifier.
Dependencies are inferred from the claim text.