CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 U.S.C. § 119(a) of a Korean patent application number 10-2019-0129116, filed on Oct. 17, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety.

BACKGROUND

1. Field

The disclosure relates to a wireless communication system. More particularly, the disclosure relates to an apparatus and a method for transmitting and receiving signals in a plurality of bands in a wireless communication system.

2. Description of Related Art

To satisfy a wireless data traffic demand which is growing after a 4th generation (4G) communication system is commercialized, efforts are exerted to develop an advanced 5th generation (5G) communication system or a pre-5G communication system. For this reason, the 5G communication system or the pre-5G communication system is referred to as a beyond 4G network communication system or a post long term evolution (LTE) system.

To achieve a high data rate, the 5G communication system considers its realization in an extremely high frequency millimeter wave (mmWave) band (e.g., 28 GHz or 60 GHz band). To mitigate a path loss of propagation and to extend a propagation distance in the extremely high frequency band, the 5G communication system is discussing beamforming, massive multiple input multiple output (MIMO), full dimensional (FD)-MIMO, array antenna, analog beam-forming, and large scale antenna techniques.

In addition, for network enhancement of the system, the 5G communication system is developing techniques, such as evolved small cell, advanced small cell, cloud radio access network (RAN), ultra-dense network, device to device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), and receive interference cancellation.

Besides, the 5G system is working on hybrid frequency shift keying and quadrature amplitude modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM) schemes, and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies.

5G systems each have multiple usable bands defined therein. A network operator may operate a 5G system in at least one band. In the case where communication services are provided using a plurality of bands, signals may be required to be simultaneously transmitted or received through a plurality of bands. In this case, a transmission/reception method for effectively processing signals is required.

The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide an apparatus and a method for supporting a plurality of bands in a wireless communication system.

Another aspect of the disclosure is to provide an apparatus and a method for simultaneously transmitting or receiving signals in a plurality of bands in a wireless communication system.

Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments.

In accordance with an aspect of the disclosure, a transceiver in a wireless communication system is provided. The transceiver includes a first circuit configured to convert a digital signal having a third bandwidth, which includes a first digital signal having a first bandwidth corresponding to a first band and a second digital signal having a second bandwidth corresponding to a second band, into an analog signal, a second circuit configured to separate the analog signal into a first analog signal corresponding to the first band and a second analog signal corresponding to the second band, up-convert the first analog signal and the second analog signal to generate a first radio frequency (RF) signal in the first band and a second RF signal in the second band, and output an RF signal having the third bandwidth, which includes the first RF signal and the second RF signal, and a third circuit configured to separate the RF signal into the first RF signal and the second RF signal, adjust a phase of the first RF signal for beamforming in the first band, and adjust a phase of the second RF signal for beamforming in the second band.

In accordance with another aspect of the disclosure, a signal processing device for a transceiver in a wireless communication system is provided. The signal processing device includes a conversion circuit configured to convert a digital signal having a third bandwidth, which includes a first digital signal having a first bandwidth corresponding to a first band and a second digital signal having a second bandwidth corresponding to a second band, into an analog signal.

In accordance with another aspect of the disclosure, a signal processing device for a transceiver in a wireless communication system is provided. The signal processing device includes a separator configured to separate an analog signal having a third bandwidth into a first analog signal having a first bandwidth corresponding to a first band and a second analog signal having a second bandwidth corresponding to a second band, mixers configured to up-convert the first analog signal and the second analog signal to generate a first RF signal in the first band and a second RF signal in the second band, and a combiner configured to generate an RF signal having the third bandwidth, which includes the first RF signal and the second RF signal.

In accordance with another aspect of the disclosure, a signal processing device for a transceiver in a wireless communication system is provided. The signal processing device includes a separator configured to separate an RF signal having a third bandwidth into a first RF signal having a first bandwidth corresponding to a first band and a second RF signal having a second bandwidth corresponding to a second band, and a phase shifter configured to adjust the phase of the first RF signal for beamforming in the first band and adjust the phase of the second RF signal for beamforming in the second band.

In accordance with another aspect of the disclosure, a method of operating a transceiver in a wireless communication system is provided. The method includes converting a digital signal having a third bandwidth, which includes a first digital signal having a first bandwidth corresponding to a first band and a second digital signal having a second bandwidth corresponding to a second band, into an analog signal, separating the analog signal into a first analog signal corresponding to the first band and a second analog signal corresponding to the second band, up-converting the first analog signal and the second analog signal to generate a first RF signal in the first band and a second RF signal in the second band, separating the RF signal having the third bandwidth, which includes the first RF signal and the second RF signal, into the first RF signal and the second RF signal, adjusting the phase of the first RF signal for beamforming in the first band, and adjusting the phase of the second RF signal for beamforming in the second band.

An apparatus and a method according to various embodiments make it possible to reduce the size of a circuit necessary for transmission and reception of signals through a plurality of bands.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure.

