Abstract: The present application provides a method for determining a CP. A STA performs channel estimation, determines a CP value according to the result of channel estimation, and sends indication information to an AP, wherein the indication information is used for indicating the CP value, so that the AP may choose a suitable CP according to the indication information. Therefore, overhead may be reduced and system throughput may be optimized.

Abstract: An apparatus for deriving a submatrix {tilde over (G)}?1 is described. The apparatus for deriving a submatrix {tilde over (G)}?1 is configured to select an N-elements-column and an N-elements-row of an N×N-Matrix G or G?1. The apparatus for deriving a submatrix {tilde over (G)}?1 is configured to rearrange the selected column to the rightest column and the selected row to the lowest row of G or G?1 so as to generate a N×N-matrix Gp or Gp?1. The apparatus for deriving a submatrix {tilde over (G)}?1 is configured to calculate a submatrix {tilde over (G)}?1 by G ~ - 1 = A - AbcA d - 1 + c T ? Ab , wherein the parameters (N?1)×(N?1)-submatrix A, b, d, c are obtained from the Gp or the Gp?1; wherein G p = [ G ~ b c T d ] , ? G p - 1 = [ A b ~ c ~ T d ~ ] .

Abstract: A client type communication device for communicating with an access point type communication device is provided. The client type communication device comprises a communication unit adapted to use at least one of first communication resources for performing a random access communication if the client type communication device is in an associated mode regarding the access point type communication device, and to use at least one of second communication resources different from the first communication resources for performing a random access communication to the access point type communication device if the client type communication device is in a non-associated mode regarding the access point type communication device.

Abstract: Embodiments of the present invention provide a physical layer protocol data unit PPDU transmission method and a corresponding PPDU transmission apparatus. Application of the method and apparatus in the embodiments of the present invention enables a receive end to quickly determine the starting position of the feature signal sequence by means of blind detection, and ensures that the receive end quickly completes data processing and status switching.

Abstract: A method for waking up a radio communications module (RCM) of a station with a wake-up receiver includes receiving a wake-up signal with the wake-up receiver, waking up the RCM from a sleeping mode, transmitting a second frame if a first frame is received within a specified time after waking up the RCM and if an integrity of the first frame is verified successfully, and placing the RCM into the sleeping mode and the wake-up receiver into an active mode if the first frame is not received within the specified time after waking up the RCM or if the first frame is received within the specified time after waking up the RCM but the integrity of the first frame is not verified successfully.

Abstract: The communication receiver comprises a mixer being configured to mix the communication signal with a periodic mixing signal having a mixing frequency fC to obtain a mixed communication signal, wherein the mixed communication signal comprises a first frequency spectrum portion comprising the spectral region of interest being situated around a frequency fRF+fC and a second frequency spectrum portion comprising the spectral range of interest being situated around fRF?fC; a first demodulator being configured to demodulate a first frequency channel of the plurality of frequency channels within the spectral range of interest of the first frequency spectrum portion on the basis of a first local oscillator frequency fLO1; and a second demodulator being configured to demodulate a second frequency channel of the plurality of frequency channels within the spectral region of interest of the second frequency spectrum portion on the basis of a second local oscillator frequency fLO2.