Communication device and method

Abstract

The invention relates to a communication device (100), comprising: a first mixer (101), for using a first mixed signal from an analog input signal X IN Generate analog output signal X OUT , the first mixer (101) includes a scaler (110) for a first sampling frequency f at a plurality of discrete time points k S,1 For the analog input signal X IN Sampling to obtain a sampled analog input signal X with continuous signal values IN [k] and by scaling the sampled analog input signal X based on a number of scaling factors A[k] IN [k] is scaled to generate the analog output signal X with continuous signal values OUT , wherein the scaling factor A[k] is a time-discrete representation of the first mixed signal; a second mixer (101') for using the second mixed signal from the analog input signal Y IN Generates an analog output signal Y OUT , the second mixer (101') includes a scaler (110') for a second sampling frequency f at a plurality of discrete time points k S,2 For the analog input signal Y IN Sampling to obtain a sampled analog input signal Y with continuous signal values IN [k] and by scaling the sampled analog input signal Y based on a number of scaling factors B[k] IN [k] is scaled to generate the analog output signal Y with continuous signal values OUT , wherein the scaling factor B[k] is a time-discrete representation of the second mixed signal; and a local oscillator (150) for providing a reference frequency f REF , where the first mixer (101) is used to derive from the reference frequency f REF derive the first sampling frequency f S,1 , the second mixer (101') is used to derive from the reference frequency f REF derive the second sampling frequency f S,2 .

Description

technical field [0001] The present invention relates to a communication device and method. In particular, the present invention relates to a communication receiver or a communication transmitter and a communication method. Background technique [0002] Mobile wireless communication devices, such as cellular telephones, smartphones, personal digital assistants (PDAs), etc., can be used to communicate with other devices over a number of different frequencies. Accordingly, it is desirable for mobile wireless communication devices to include communication receivers capable of receiving communication signals at a plurality of different frequencies. In some cases, it is necessary to receive and demodulate two or more communication signals in different frequency bands using a technique known as multicarrier aggregation. In this way, there is greater bandwidth available so that more information can be transmitted per second for a more pleasant user experience. [0003] For this r...

AI Technical Summary

Problems solved by technology

Typically, such mixers include a PLL for each frequency band, however, this PLL greatly increases the area and power consumption of the communication receiver

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