Abstract:
Methods, systems, and devices for wireless communications are described for configuration aspects of a tracking reference signal in New Radio. A base station may select a frequency offset parameter; transmit configuration information indicating the frequency offset parameter; and transmit a tracking reference signal (TRS) transmission having a frequency offset corresponding to the frequency offset parameter. The UE may receive configuration information indicating a frequency offset parameter; detect a TRS transmission within a frequency band based at least in part on the frequency offset parameter; and perform resource tracking based at least in part on the detected TRS transmission.
Abstract:
A method of data transmission over guard sub-carriers is provided in a multi-carrier OFDM system. Adjacent radio frequency (RF) carriers are used to carry radio signals transmitted through adjacent frequency channels. A plurality of guard sub-carriers between adjacent frequency channels are aligned and identified for data transmission in a pre-defined physical resource unit. The identified guard sub-carriers do not overlap with normal data sub-carriers of the radio signals transmitted through the adjacent frequency channels. At least one of the identified guard sub-carriers is reserved as NULL sub-carrier. A flexible multi-carrier transceiver architecture is also provided in a multi-carrier OFDM system. Different multi-carrier and/or MIMO/SISO data transmission schemes are implemented by adaptively reconfigure same hardware modules including common MAC layer module, physical layer entities, and RF entities. Furthermore, the flexible multi-carrier transceiver architecture can be used to support data transmission over guard sub-carriers.
Abstract:
A method for operating an access point (AP) in a wireless local area network (WLAN). The method comprises identifying a bandwidth of an orthogonal frequency division multiple access physical protocol data unit (OFDMA PPDU) by at least one of a primary channel or at least one secondary channel, and nulling a plurality of tones of OFDMA PPDU for the at least one secondary channel sensed busy. The method further comprises transmitting, to a station (STA), a bandwidth signaling sub-field in high efficiency signal-A (HE-SIG-A) field included in a high efficiency multi-user PPDU (HE MU PPDU) indicating availability of at least one content channel, wherein the at least one content channel of high efficiency signal-B (HE-SIG-B) field on the downlink signal including a primary channel and one or more secondary channels that comprise a plurality of OFDMA PPDUs.
Abstract:
Disclosed herein is a broadcast signal transmitter. A broadcast signal transmitter according to an embodiment of the present invention includes an input formatting module configured to perform baseband formatting and to output the data of at least one Physical Layer Pipe (PLP), a BICM module configured to perform error-correction processing on the PLP data, a framing and interleaving module configured to interleave the PLP data and to generate a signal frame, and a waveform generation module configured to insert a preamble into the signal frame and to generate a broadcast signal by performing OFDM modulation.
Abstract:
A transmission apparatus and transmitting method for signaling parameters of a part of a frame, and a reception apparatus and receiving method for decoding a part of a transmission frame. The transmitting method includes generating, using processing circuitry of a transmission apparatus, a transmission frame. The transmission frame includes a plurality of parts. A last symbol in a first one of the plurality of parts includes signaling information for decoding a second one of the plurality of parts. The transmitting method further includes transmitting the transmission frame using the processing circuitry.
Abstract:
Embodiments of the present invention provide a wireless local area network transmission method and device, where the method includes: generating a packet, where first L time domain sequence bits of a second symbol in the packet are the same as first L time domain sequence bits of an information bearing section in a time domain sequence of a first symbol in the packet, the first symbol includes a cyclic prefix CP and the information bearing section, the second symbol is a symbol following the first symbol, a length of the CP is 16 bits, and a length of the information bearing section is 64 bits, where 1≤L≤64; and sending the packet to a receive end, so that the receive end receives and parses the packet. According to the method and the device in the embodiments of the present invention, not only backward compatibility can be ensured, but also robustness of transmission in an outdoor scenario can be strengthened to an extent.
Abstract:
A receiver controller configured to control a receiver in receipt a signal comprising a series of time-consecutive symbols, each symbol comprising an FFT window and a guard interval, said guard interval comprising a cyclic prefix or postfix, the receiver controller configured to control the receiver to acquire at least one signal parameter, the receiver controller configured to; based on a plurality of samples of the received signal, each sample having a predetermined sample length, provide for determination of a plurality of correlation values based on pairs of the plurality of samples, said pairs of samples separated in time by a predetermined separation number of samples; provide for determination of a first correlation block comprising a plurality of consecutive correlation values, the number of correlation values within the first correlation block based on a predetermined correlation block size, provide for determination of a second correlation block comprising a plurality of consecutive correlation values, the number of correlation values within the second correlation block based on the predetermined correlation block size, wherein the temporal separation between the first and the second correlation blocks is based on the predetermined correlation block size, provide for determination, using an average of at least the first correlation block and the second correlation block, an average correlation block; and if one or more average correlation values above a predetermined threshold are present in the average correlation block, acquire the at least one signal parameter of the signal, from the average correlation block, comprising the length of the guard interval and/or the length of the service data window and/or the timing of the symbols that form the signal.