 cyclic shift Periodicity (p) If p = 0b000 no periodicity or terminate the periodicity; otherwise, repeat sounding every 2 -1) frames Antenna Switching Ob0: Antenna switching; Ob1: No antenna switching. Power Boosting Ob0: No power boosting; Ob1: 3 dB power boosting. mode. The Ns indicates the pilot pattern used in the open-loop region where CQI measurements are conducted by the MS. The UL Sounding Command A-MAP IE is used to schedule and configure the uplink sounding channel. The details of the physical structure and operation of sounding will be described in the next section. Table 10-8 describes the parameters of the UL Sounding Command A-MAP IE. The number of UL sounding transmissions per frame that the BS allocates to an MS does not exceed one instance. The sounding sub-band bitmap is used to identify the sounding sub-bands used in the sounding allocation. For this purpose, the Nused contiguous sub-carriers are divided into sounding sub-bands, where each sounding sub-band consists of N1Psc adjacent sub-carriers with N1 = and Psc for NFFT = 1024,2048. The MSB of the sounding sub-band bitmap corresponds to the sounding sub-band with lowest sub-carrier index. The three periodicity bits are used to instruct the MS to periodically repeat the sounding trans- mission. If the antenna switching flag is set to zero, the MS performs sounding using antenna switching; otherwise, the MS performs sounding using all transmit antennas. The MS performs sounding using one transmit antenna at the each sounding opportunity starting from antenna 1 to antenna Nt. If power boosting is enabled, 3 dB power-boosting per sub-carrier is applied to each MS transmit antenna. The CDMA Allocation A-MAP IE is used by the BS for uplink bandwidth allocation to a user requested bandwidth using asynchronous ranging code or bandwidth request preamble. Furthermore, in a contention-based random access ranging procedure, the BS transmits the AAI_RNG-RSP message through a downlink burst assigned by CDMA Allocation A-MAP IE to an MS with no STID or TS