Signal processing circuit and related communication method
A technology of signal processing circuit and communication method, which is applied in the direction of space transmission diversity, diversity/multi-antenna system, etc., can solve the problems of space occupied by isolators, limited bandwidth of isolators, and inability to provide isolation functions, etc., and achieves easy adjustment and installation The effect of downsizing
Active Publication Date: 2012-09-19
REALTEK SEMICON CORP
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On the other hand, the isolator not only needs to occupy a lot of space, but also has a limited bandwidth, which often cannot provide sufficient isolation function
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[0023] Embodiments of the present invention will be described below in conjunction with related figures. In the drawings, the same reference numerals designate the same or similar components. Certain words are used to refer to specific components in the description and subsequent claims, and those skilled in the art should understand that different terms may be used to refer to the same component. This description and subsequent patent applications do not use the difference in name as a way to distinguish components, but use the difference in function of components as a basis for distinction. The "comprising..." mentioned throughout the specification and the subsequent claims is an open term and should be interpreted as "including but not limited to...". In addition, the term "coupled" includes any direct and indirect means of connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device can be directly connec...
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The invention discloses a signal processing circuit and a related communication method. According to one of the embodiments, the signal processing circuit comprises a first node coupled to a first antenna, a second node coupled to a second antenna, a third node for receiving and sending a first signal transmitted by a circuit, a fourth node coupled to a receiving circuit, a signal splitting circuit, a phase-shift circuit and a signal coalition circuit; the signal splitting circuit is used for splitting the first signal into a secondary signal and a third signal and transmitting the secondary signal to the first antenna; the phase-shift circuit is used for changing the phase position of the third signal so as to generate a fourth signal; the fourth signal can be used for offsetting at least one part of a coupling signal between the third node and the fourth node; and the signal coalition circuit is used for consolidating the fourth signal and a fifth signal received by the second antenna and transmitting the consolidated signal to the receiving circuit.
Description
technical field [0001] The present invention relates to a signal processing circuit, in particular to a signal processing circuit used in a multi-antenna wireless communication device. Background technique [0002] In a wireless communication system, multiple antennas can be used for transmission to achieve functions such as space diversity and multiple-input-multiple-output (MIMO), which can effectively improve system performance. For example, devices supporting industry standards such as IEEE 802.11n or long term evolution have adopted multiple antennas to provide MIMO functionality. [0003] However, using multiple antennas can also have negative effects. For example, a signal sent by a certain antenna will be coupled to another antenna and become noise or interference signal when the receiving circuit processes the signal. Therefore, when multiple antennas are used, excessively large signals coupled between the antennas will degrade the performance of the system. [0...
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IPC IPC(8): H04B7/04
Inventor 潘波凌菁伟
Owner REALTEK SEMICON CORP