Apparatus and methods of receive diversity (RXD) full cell search

A non-transitory computer-readable medium storing computer executable code for performing a full search by a user equipment in a wireless communication system, -comprising:

• code for determining a first set of received energies of a first signal received at a first antenna;
• code for determining a second set of received energies of a second signal received at a second antenna, wherein determining the second set occurs separate from the determining of the first set;
• code for selecting a set of peak energies and corresponding antenna indices from the first set of received energies and the second set of received energies, the antenna indices indicating a selected antenna of the first antenna and the second antenna corresponding to each peak, wherein the code for selecting the set of peak energies and corresponding antenna indices comprises:
• code for combining the first set with the second set to define a combined set including a first received energy of the first signal received at the first antenna and a second received energy of the second signal received at the second antenna, for each of a plurality of positions;
• code for determining a set of top peak energies having highest peak energy values from the combined set;
• and
• code for determining the corresponding antenna index and the position corresponding to each of the set of top peak energies;
• code for determining a slot timing of at least one cell corresponding to the set of peak energies and corresponding antenna indices based on the positions of the set of top peak energies and the corresponding antenna indices;
• and
• code for using a respective one of the first antenna and the second antenna corresponding to each of the set of peak energies and the corresponding antenna indices, and the respective slot timing of the at least one cell, to determine a frame timing and a scrambling code for the at least one cell.

An apparatus for performing a full cell search by a user equipment in a wireless communication system, comprising:

• means for determining a first set of received energies of a first signal received at a first antenna;
• means for determining a second set of received energies of a second signal received at a second antenna, wherein determining the second set occurs separate from the determining of the first set;
• means for selecting a set of peak energies and corresponding antenna indices from the first set of received energies and the second set of received energies, the antenna indices indicating a selected antenna of the first antenna and the second antenna corresponding to each peak, wherein the means for selecting are configured to;
• combine the first set with the second set to define a combined set including a first received energy of the first signal received at the first antenna and a second received energy of the second signal received at the second antenna, for each of a plurality of positions;
• determine a set of top peak energies having highest peak energy values from the combined set;
• and
• determine the corresponding antenna index and the position corresponding to each of the set of top peak energies;
• means for determining a slot timing of at least one cell corresponding to the set of peak energies and corresponding antenna indices based on the positions of the set of top peak energies and the corresponding antenna indices;
• and
• means for using a respective one of the first antenna and the second antenna corresponding to each of the set of peak energies and the corresponding antenna indices, and the respective slot timing of the at least one cell, to determine a frame timing and a scrambling code for the at least one cell.

An apparatus for performing a full cell search by a user equipment in a wireless communication system, comprising:

• a first antenna configured to receive a first signal;
• a second antenna configured to receive a second signal;
• at least one memory;
• and
• a processor in communication with the memory, the processor and the memory configured to:
• determine a first set of received energies of the first signal received at the first antenna;
• determine a second set of received energies of the second signal received at the second antenna, wherein determining the second set occurs separate from the determining of the first set;
• select a set of peak energies and corresponding antenna indices from the first set of received energies and the second set of received energies, the antenna indices indicating a selected antenna of the first antenna and the second antenna corresponding to each peak, wherein the processor is configured to:
• combine the first set with the second set to define a combined set including a first received energy of the first signal received at the first antenna and a second received energy of the second signal received at the second antenna, for each of a plurality of positions,
• determine a set of top peak energies having highest peak energy values from the combined set, and
• determine the corresponding antenna index and the position corresponding to each of the set of top peak energies;
• determine a slot timing of at least one cell corresponding to the set of peak energies and corresponding antenna indices based on the positions of the set of top peak energies and the corresponding antenna indices;
• and
• use a respective one of the first antenna and the second antenna corresponding to each of the set of peak energies and the corresponding antenna indices, and the respective slot timing of the at least one cell, to determine a frame timing and a scrambling code for the at least one cell.