Abstract:
비직교 다중 접속 기법이 적용된 무선 통신 시스템에서 경쟁 기반으로 상향링크 데이터를 전송하는 방법 및 기기가 제공된다. 구체적으로, 단말은 기지국으로부터 비직교 다중 접속을 위해 기정의된 코드워드에 대한 정보를 수신한다. 기정의된 코드워드는 제1 확산 코드 및 제2 확산 코드를 포함한다. 단말은 제1 확산 코드를 사용하여 기본 계층을 구성하고, 제2 확산 코드를 사용하여 추가 계층을 구성한다. 단말은 기본 계층 및 추가 계층을 중첩 사용하는 경쟁 기반 자원을 통해 단말의 식별자 및 데이터를 기지국으로 전송한다. 이때, 단말의 식별자는 기본 계층을 통해 전송되고, 데이터는 추가 계층을 통해 전송된다.
Abstract:
The present disclosure relates to a technique for configuring transmission of a multicast channel carrying scheduling information and data belonging to one or more multicast services, the scheduling information indicating scheduling of the multicast services mapped to the multicast channel. A method embodiment comprises the steps of configuring (404) the transmission of the scheduling information on the multicast channel based on a scheduling information specific transmission requirement and configuring (404) the transmission of the data belonging to the one or more multicast services based on a service specific transmission requirement; and signalling (406) the scheduling information specific transmission requirement and the service specific transmission requirement.
Abstract:
Auxiliary data (x(m)) is transported in a primary data signal (s(t)) by hiding the data in the form of colored noise. The colored noise has a spectrum that simulates the spectrum of the primary data signal. The data to be transported is first converted to a spread spectrum signal d(t). The primary data signal is analyzed to determine its spectral shape. The same spectral shape is imparted to the spread spectrum signal, which is then combined with the primary data signal for transmission. The spectral shaping can be performed using time domain modeling and synthesis such as linear predictive coding (88, 94) or by using subband coding techniques such as fast Fourier transforms (174). A plurality of different auxiliary information streams (280, 290, 300) can be transported on the primary data signal. By adjusting the gain (287, 297, 307, 309) of individual spread spectrum signal carrier(s) and the power (96) of the colored noise, the auxiliary information stream(s) can be rendered at any desired level below or above an interference threshold in the primary data signal.
Abstract:
A method and apparatus for multiple frequency, multiple channel digital information transfer through time slot allocation. The apparatus consists of one or more transmitting devices (1, 4) and one or more receiving devices (16). Multiple source signals are each allocated a time slot and a frequency. A continuous synchronizing wave defines the time slots and provides for time slot tracking. Digital signals from each source are allocated a time slot and assigned one of the information wave frequencies in that time slot. The information waves are combined with the synchronizing wave and transmitted to one or more receivers as one signal in each time slot. The manner in which the waves are combined allows the components to be extracted by the receivers (16) largely through the use of curve fitting techniques rather than through the use of filters. The output digital signals can be calibrated through the use of a synchronization wave with a reference amplitude or through the use of one or more of the information waves as a reference.