摘要:
A method of reducing an amount of channel information fed back by a mobile device in a wireless communication system to a plurality of transmission points of the wireless communication system is disclosed. the method comprises measuring signal quality between the mobile device and the plurality of transmission points; determining a set of the plurality of transmission points, if the signal quality is in one of a plurality of quality regions; and feeding back the channel information to the set of the plurality of transmission points, wherein the channel information is related to a plurality of channels between the mobile device and the set of the plurality of transmission points.
摘要:
A method of performing feedback load reduction for a mobile device in a wireless communication system is disclosed. The method comprises measuring a signal from the network to get Channel State Information (CSI); comparing the measured CSI with at least one threshold and determining one region where the CSI falls in from a plurality of regions divided by the at least one threshold and ranked in order; and sending a rank for the determined region to the network.
摘要:
A method of performing feedback load reduction for a mobile device in a wireless communication system is disclosed. The method comprises measuring a signal from the network to get Channel State Information (CSI); comparing the measured CSI with at least one threshold and determining one region where the CSI falls in from a plurality of regions divided by the at least one threshold and ranked in order; and sending a rank for the determined region to the network.
摘要:
A method of reducing an amount of channel information fed back by a mobile device in a wireless communication system to a plurality of transmission points of the wireless communication system is disclosed. the method comprises measuring signal quality between the mobile device and the plurality of transmission points; determining a set of the plurality of transmission points, if the signal quality is in one of a plurality of quality regions; and feeding back the channel information to the set of the plurality of transmission points, wherein the channel information is related to a plurality of channels between the mobile device and the set of the plurality of transmission points.
摘要:
A method of determining a modulation and coding scheme (MCS) for a next hybrid automatic repeat request (HARQ) transmission for a receiver in a wireless communication system is disclosed. The method comprises measuring signal quality of a present HARQ transmission when receiving complete information transmitted by a transmitter of the wireless communication system in the present HARQ transmission; determining normalized signal quality according to the signal quality and remaining part of the complete information to be received in the next HARQ transmission; and determining the MCS according to the normalized signal quality, for processing the remaining part of the complete information according to the MCS.
摘要:
A method of transmitting a plurality of data symbols for a transmitter in a wireless communication system is disclosed. The method comprises encoding the plurality of data symbols into a plurality of precoded symbols according to an antipodal paraunitary (APU) precoding; processing the plurality of precoded symbols by using multi-input multi-output (MIMO) and orthogonal frequency-division multiplexing (OFDM), for generating a plurality of transmission symbols; and transmitting the plurality of transmission symbols via a plurality of transmit antennas according to operations of the MIMO and the OFDM.
摘要:
A low-power, high-performance source-synchronous chip interface which provides rapid turn-on and facilitates high signaling rates between a transmitter and a receiver located on different chips is described in various embodiments. Some embodiments of the chip interface include, among others: a segmented “fast turn-on” bias circuit to reduce power supply ringing during the rapid power-on process; current mode logic clock buffers in a clock path of the chip interface to further reduce the effect of power supply ringing; a multiplying injection-locked oscillator (MILO) clock generator to generate higher frequency clock signals from a reference clock; a digitally controlled delay line which can be inserted in the clock path to mitigate deterministic jitter caused by the MILO clock generator; and circuits for periodically re-evaluating whether it is safe to retime transmit data signals in the reference clock domain directly with the faster clock signals.
摘要:
A method for transmitting data in a communication system employing an encoding scheme includes processing data in accordance with a particular processing scheme to provide a plurality of information symbols; shaping a constellation of the plurality of information symbols to obtain a plurality of shaped symbols; processing the plurality of shaped symbols in accordance with the encoding scheme to obtain a plurality of transformed signals such that the peak to average power ratio (PAR) of the plurality of transformed symbols is lower than the PAR would be if the information symbols were not shaped into shaped symbols prior to processing into transformed symbols, wherein the encoding scheme may be expressed in a form x=Gs, sεZN, GεRN×N, where x is an isomorphic vector representation of transformed signals, G is an N×N invertible generator matrix, s is a vector of a plurality of information symbols, and R represents the real domain; and transmitting the plurality of transformed signals over a communication network.
摘要:
Information is transmitted over selected, Orthogonal Frequency Division Multiplexed (OFDM) sub-channels to avoid frequencies with unacceptable congestion, noise or interference levels. Using frequency hopping, selected non-contiguous OFDM sub-channels used for transmission may vary with time. Once a group of OFDM sub-channels is selected, a power level and modulation technique may also be selected based on channel quality.
摘要:
A low-power, high-performance source-synchronous chip interface which provides rapid turn-on and facilitates high signaling rates between a transmitter and a receiver located on different chips is described in various embodiments. Some embodiments of the chip interface include, among others: a segmented “fast turn-on” bias circuit to reduce power supply ringing during the rapid power-on process; current mode logic clock buffers in a clock path of the chip interface to further reduce the effect of power supply ringing; a multiplying injection-locked oscillator (MILO) clock generator to generate higher frequency clock signals from a reference clock; a digitally controlled delay line which can be inserted in the clock path to mitigate deterministic jitter caused by the MILO clock generator; and circuits for periodically re-evaluating whether it is safe to retime transmit data signals in the reference clock domain directly with the faster clock signals.