A method for synchronizing baseband clocks in an OFDMA wireless microphone system is disclosed. An example method includes receiving a plurality of pilot subcarriers from an audio transmitter. The method also includes determining a timing offset estimate based on the pilot subcarriers. The method further includes determining a tuning value by passing the timing offset estimate through a proportional-integral controller. The method still further includes determining a modified reference signal by modifying a reference oscillator based on the tuning value. And the method yet further includes controlling (i) an audio sample clock and (ii) an antenna data clock based on the modified reference signal.

A method for synchronizing baseband clocks in an OFDMA wireless microphone system is disclosed. An example method includes receiving a plurality of pilot subcarriers from an audio transmitter. The method also includes determining a timing offset estimate based on the pilot subcarriers. The method further includes determining a tuning value by passing the timing offset estimate through a proportional-integral controller. The method still further includes determining a modified reference signal by modifying a reference oscillator based on the tuning value. And the method yet further includes controlling (i) an audio sample clock and (ii) an antenna data clock based on the modified reference signal.

An information receiving method, an information sending method, and a device are provided. Under these methods, a timing adjustment amount can be determined by a first access network device. The timing adjustment amount is an adjustment amount between a first timing at which the first access network device sends a first downlink signal to a first terminal device on a first frequency band and a second timing at which the first access network device sends a second downlink signal to the first terminal device on a second frequency band. The first frequency band and the second frequency band are paired frequency bands. First indication information can be sent, by the first access network device, to the first terminal device. The first indication information indicates the timing adjustment amount.

A method for synchronizing baseband clocks in an OFDMA wireless microphone system is disclosed. An example method includes receiving a plurality of pilot subcarriers from an audio transmitter. The method also includes determining a timing offset estimate based on the pilot subcarriers. The method further includes determining a tuning value by passing the timing offset estimate through a proportional-integral controller. The method still further includes determining a modified reference signal by modifying a reference oscillator based on the tuning value. And the method yet further includes controlling (i) an audio sample clock and (ii) an antenna data clock based on the modified reference signal.

A method for synchronizing baseband clocks in an OFDMA wireless microphone system is disclosed. An example method includes receiving a plurality of pilot subcarriers from an audio transmitter. The method also includes determining a timing offset estimate based on the pilot subcarriers. The method further includes determining a tuning value by passing the timing offset estimate through a proportional-integral controller. The method still further includes determining a modified reference signal by modifying a reference oscillator based on the tuning value. And the method yet further includes controlling (i) an audio sample clock and (ii) an antenna data clock based on the modified reference signal.

A terminal device is provided such that in a case that closed-loop UE transmit antenna selection is configured, a bit sequence is given by scrambling CRC parity bits with an RNTI and an antenna selection mask, in a case that the number of the CRC parity bits is a first value, a first transmit antenna port is given by a first antenna selection mask, and in a case that the number of the CRC parity bits is a second value, the first transmit antenna port is given by a second antenna selection mask that is different from the first antenna selection mask.

An information receiving method, an information sending method, and a device are provided. Under these methods, a timing adjustment amount can be determined by a first access network device. The timing adjustment amount is an adjustment amount between a first timing at which the first access network device sends a first downlink signal to a first terminal device on a first frequency band and a second timing at which the first access network device sends a second downlink signal to the first terminal device on a second frequency band. The first frequency band and the second frequency band are paired frequency bands. First indication information can be sent, by the first access network device, to the first terminal device. The first indication information indicates the timing adjustment amount.

A terminal device is provided such that in a case that closed-loop UE transmit antenna selection is configured, a bit sequence is given by scrambling CRC parity bits with an RNTI and an antenna selection mask, in a case that the number of the CRC parity bits is a first value, a first transmit antenna port is given by a first antenna selection mask, and in a case that the number of the CRC parity bits is a second value, the first transmit antenna port is given by a second antenna selection mask that is different from the first antenna selection mask.

A terminal device is provided such that in a case that closed-loop UE transmit antenna selection is configured, a bit sequence is given by scrambling CRC parity bits with an RNTI and an antenna selection mask, in a case that the number of the CRC parity bits is a first value, a first transmit antenna port is given by a first antenna selection mask, and in a case that the number of the CRC parity bits is a second value, the first transmit antenna port is given by a second antenna selection mask that is different from the first antenna selection mask.

A time and frequency synchronization method that includes the steps outlined below is provided. A wireless signal from a base station is received. The wireless signal is delayed on a time domain and is further correlated with the original wireless signal to generate a delayed and correlated signal. Primary symbols related to a primary synchronization signal are delayed and are further correlated with the original primary symbols to generate delayed and correlated primary symbols. The delayed and correlated signal and the delayed and correlated primary symbols are correlated to identify the position of the primary synchronization signal based on a primary peak value. The position of the secondary synchronization signal is identified based on the position of the primary synchronization signal.