Methods of multipath acquisition for dedicated traffic channels
AssigneeAlcatel-Lucent USA Inc.
InventorsFrancis Dominique, Hongwel Kong
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Abstract
In a method of multipath acquisition for a dedicated traffic channel, path positions of the traffic channel that have desired signal energy for processing in a base station receiver may be determined as a function of pilot signal information and other control information contained in a control part of the traffic channel.
Claims19
A method of multipath acquisition, at a base station receiver, for a dedicated uplink traffic channel, the method comprising:
- calculating a frame energy metric of a control part of the traffic channel for each of a plurality of path positions received by the base station receiver, wherein the calculating the frame energy metric for each of the plurality of path positions includes,
- descrambling and despreading a filtered output of a traffic channel frame received by the base station receiver into a plurality of output symbols corresponding to control information in the control part of the traffic channel frame, the traffic channel frame corresponding to a given one of the plurality of path positions, and the control information including at least transmit power control (TPC) bits;
- accumulating output symbols corresponding to pilot signal bits within a slot of the traffic channel frame and output symbols corresponding to TPC bits within a slot of the traffic channel frame,
- calculating L2 norms for the accumulated output pilot symbols and L2 norms for the accumulated output TPC symbols, and
- accumulating the L2 norms to generate the frame energy metric for a given one of the plurality of path positions;
- comparing the frame energy metric for each path position to a threshold;
- and
- reporting the path positions with a frame energy metric exceeding the threshold to processing circuitry within the base station receiver.
A method of multipath acquisition, at a base station receiver, for a dedicated uplink traffic channel, comprising:
- calculating a frame energy metric of a control part of a traffic channel for each of a plurality of path positions received by the base station receiver, the frame energy metric for the control part being calculated by accumulating output symbols corresponding to pilot signal bits within a slot of the traffic channel frame and symbols corresponding to one or more of transmit power control (TPC) bits, feedback information (FBI) bits and transport-format combination (TFCI) bits within the slot of the traffic channel frame;
- comparing the frame energy metric for each path position to a threshold;
- and
- determining path positions of the traffic channel that have desired signal energy for processing in a base station receiver based on the comparing step.
A method of calculating frame energy of a dedicated uplink traffic channel frame for multipath acquisition of one or more path positions of the frame that are received by a base station receiver, comprising
- descrambling and despreading a filtered output of a traffic channel frame received by the base station receiver, which corresponds to a given path position, into a plurality of output symbols corresponding to control information in a control part of the frame,
- accumulating output symbols corresponding to pilot signal bits within a slot of the frame and symbols corresponding to one or more of transmit power control (TPC) bits, feedback information (FBI) bits and transport-format combination (TFCI) bits in the given slot, and
- calculating L2 norms for the pilot symbols and one or more of the TPC, FBI and TFCI symbols over the slot, wherein the calculated L2 norms of the accumulated symbols for the pilot signal and one or more of the TPC, FBI and TFCI bits are accumulated over the traffic channel frame to determine the traffic channel frame energy for the given path position.
A method of multipath acquisition, at a base station receiver, for a dedicated uplink traffic channel, comprising:
- calculating a frame energy metric of a control part of a traffic channel for each of a plurality of path positions received by a base station receiver, the frame energy metric for the control part being calculated by accumulating output symbols corresponding to pilot signal bits within a slot of a traffic channel frame and output symbols corresponding to power control bits within the slot of the traffic channel frame;
- comparing the frame energy metric for each path position to a threshold;
- and
- determining path positions of the traffic channel that have desired signal energy for processing in a base station receiver based on the comparing step.
Dependencies are inferred from the claim text.