WO2011076076A1

WO2011076076A1 - Multi-path reception apparatus, receiver and base station

Info

Publication number: WO2011076076A1
Application number: PCT/CN2010/079827
Authority: WO
Inventors: 徐向宁
Original assignee: 华为技术有限公司
Priority date: 2009-12-25
Filing date: 2010-12-15
Publication date: 2011-06-30
Also published as: CN201699698U

Abstract

A multi-path reception apparatus, receiver and base station are provided in the present invention, wherein said multi-path apparatus comprises: at least two antenna ports, at least two Low Noise Amplifiers (LNAs), at least two mixers, at least two Intermediate Frequency (IF) filters, one combiner, one Analog Digital Converter (ADC) and one digital module. The multi-path reception channels provided by the present invention share one and the same ADC, the outgoing signals from respective IF filter are combined by the combiner and then transmitted to ADC. In this way, ADC performs analog-digital conversion to the combined signal and transmits it to the digital module. As the multi-path reception channels merely employ one ADC, only one ADC communicates with the digital module. In this way, the circuit configuration is simplified, and so the total cost of the system is decreased.

Description

Multi-channel receiving device, receiver and base station

This application claims the priority of the Chinese Patent Application entitled "Multiple Receiver, Receiver and Base Station" by the Chinese Patent Office on December 25, 2009, Application No. 200920274159. This is incorporated herein by reference.

TECHNICAL FIELD The present invention relates to the field of network communication technologies, and in particular, to a multi-channel receiving apparatus, a receiver, and a base station. BACKGROUND OF THE INVENTION With the development of wireless communication technologies, multi-channel receiving systems have become the main method for improving uplink capacity and coverage. Currently, a receiver in a multi-channel receiving system is composed of a digital module and an analog module.

At present, the multi-channel receiving system is realized by a multi-channel single receiving channel. For example, a two-way receiving system is implemented using two single-channel receive channels.

The following describes the single-channel receiving channel. See Figure 1, which is a schematic diagram of a single-channel receiving channel in the prior art.

The antenna port 101 receives the wireless signal of the space and sends the wireless signal to the Low Noise Amplifier (LNA) 102. The LNA 102 amplifies the signal. The amplified signal is mixed with the local frequency (L0, Local Oscilator) in the mixer Mixerl03. The mixed signal is filtered by an intermediate frequency (IF) filter 104 and sent to an analog-to-digital converter (ADC) 105. The ADC 105 sends the converted digital signal to the digital module 106.

A schematic diagram of a two-way receiving system constructed by the single-channel receiving channel shown in FIG. 1 in the prior art is shown in FIG. 2. In Figure 2, two independent single-channel receiving channels, the analog module uses independent receiving channels, and separate ADCs are used to convert the analog signals into digital signals and then sent to the corresponding digital modules.

However, the current two or more receiving channels consisting of independent single receiving channels require an ADC for each channel, and a digital module is connected to each ADC, which increases the circuit's Complexity affects the layout of the circuit, which increases system cost. Summary of the invention

A simplified summary of various aspects of the claimed subject matter is presented below in an effort to provide a basic understanding of these aspects. This summary is not an extensive overview of all aspects that have been conceived, and is not intended to identify critical or critical elements. Its sole purpose is to present some concepts of the disclosed aspects in a simplified

In accordance with an aspect of the invention, a multi-channel receiving device is described herein that simplifies the circuit configuration and reduces system cost.

An aspect of the present invention provides a multi-channel receiving apparatus including: an antenna port, a low noise amplifier (LNA), a mixer, an intermediate frequency filter, a combiner, a digital to analog converter (ADC), and a digital module. The number of antenna ports, LNAs, mixers, and IF filters is the same, and at least two. The combiner, ADC and digital module are all one. The antenna port is configured to receive a wireless signal, and send the received wireless signal to the LNA. The LNA is configured to amplify the wireless signal and send the amplified signal to the mixer. The mixer is configured to mix the received signals, and send the mixed signals to the intermediate frequency filter. The intermediate frequency filter is configured to perform intermediate frequency filtering on the received signal, and send the intermediate frequency filtered signal to the combiner. The combiner is configured to receive signals sent by at least two of the intermediate frequency filters, and combine the received signals and send the signals to the ADC. The ADC is configured to perform analog-to-digital conversion on the received signal and send the signal to the digital module. The embodiment of the invention further provides a receiver, which comprises the multi-channel receiving device described in the above embodiments.

Another aspect of the present invention also provides a base station, including the receiver described in the above embodiments. In the above technical solution, the multiple receiving channels share one ADC, and the signals from the respective IF filters are combined by the combiner and then sent to the ADC. In this way, the ADC performs analog-to-digital conversion on the combined signal and sends it to the digital module. Since only one ADC is used for multiple receive channels, only one ADC communicates with the digital module. This simplifies the circuit structure and reduces the overall cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly described in the description of the embodiments. The invention is illustrated by way of example and not limitation, and the drawings in the following description are only a few embodiments of the present invention, and those skilled in the art can These drawings take additional drawings.

1 is a schematic diagram of a single-channel receiving device in the prior art;

2 is a schematic diagram of a two-way receiving device in the prior art;

3 is a schematic structural diagram of a multi-channel receiving apparatus according to an embodiment of the present invention;

4 is a schematic structural diagram of another multi-channel receiving apparatus according to another embodiment of the present invention; FIG. 5 is a schematic diagram showing the frequency of an LNA output signal according to another embodiment of the present invention; FIG. 6 is a diagram of another embodiment of the present invention. A schematic diagram of the frequency of a mixer output signal. DETAILED DESCRIPTION OF THE INVENTION In the following description, for purposes of illustration and description, reference However, the technology in the field It should be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the invention.

First, a multi-channel receiving device is described in the embodiment of the present invention, including: an antenna port, a low noise amplifier (LNA), a mixer, an intermediate frequency filter, a combiner, a digital-to-analog converter (ADC), and a digital module.

The number of antenna ports, LNAs, mixers, and IF filters is the same, and at least two.

The combiner, ADC and digital module are all one.

The antenna port is configured to receive a wireless signal and send the received wireless signal to the LNA. The LNA is configured to amplify the wireless signal and send the amplified signal to the mixer.

The mixer is configured to mix the received signals and send the mixed signals to the intermediate frequency filter.

The intermediate frequency filter is configured to perform intermediate frequency filtering on the received signal, and send the intermediate frequency filtered signal to the combiner.

The combiner is configured to receive signals sent by at least two of the intermediate frequency filters, and combine the received signals and send the signals to the ADC.

The ADC is configured to perform analog-to-digital conversion on the received signal to the digital module. Referring to FIG. 3, the figure is a schematic diagram of a multi-channel receiving apparatus according to an embodiment of the present invention.

The multiple receiving apparatus provided in this embodiment includes: at least two antenna ports 301a and 301b, at least two LNAs 302a and 302b, at least two mixers 303a and 303b, at least two IF filters 304a and 304b, and a combination. The router 305, a digital to analog converter ADC 306 and a digital module 307.

It should be noted that the number of the antenna port, the LNA, the mixer, and the IF filter are the same, and at least two. The combiner, ADC and digital module are all one.

The wireless signal received by the antenna port sequentially passes through the LNA, the mixer and the IF filter, and the signal output by the IF filter is combined at the combiner, and the combined signal is converted into the digital module after being converted by the ADC.

It should be noted that the multiple receiving apparatus provided in this embodiment does not limit the number of receiving channels, and may be two or more. However, one ADC may be shared regardless of several receiving channels.

The multiple receive channels share an ADC, and the signals from the respective IF filters are combined by the combiner and then sent to the ADC. In this way, the ADC performs analog-to-digital conversion on the combined signal and sends it to the digital module. Since only one ADC is used for multiple receive channels, only one ADC communicates with the digital block. This simplifies the circuit structure and reduces the overall cost of the system.

It should be noted that the frequency of the signals received by the antenna ports may be the same (that is, the frequencies of the wireless signals received by the respective channels are the same), or may be different (that is, the frequencies of the wireless signals received by the respective channels are different), and may be provided by using the embodiments of the present invention. Multiple receive channels. However, since the same ADC is used, it is necessary to ensure that the frequencies of the signals output by the respective mixers are different. Specifically, the local oscillator frequencies used in the respective mixers can be adjusted according to the frequency of the signals received by the respective antenna ports to achieve different frequencies of the mixed signals of the respective mixer outputs.

Referring to FIG. 4, it is a schematic diagram of a specific example of a multi-channel receiving apparatus according to an embodiment of the present invention.

In this embodiment, the multi-channel receiving device takes two channels as an example, and details the implementation of the multi-channel receiving device.

It is assumed in this embodiment that the frequencies of the wireless signals received by the two antenna ports are the same.

It should be noted that the frequency response characteristics of the first antenna port 401a and the second antenna port 401b are the same; the frequency response characteristics of the first LNA 402a and the second LNA 402b are the same; the frequencies of the first mixer 403a and the second mixer 403b The response characteristics are the same; the frequency response characteristics of the first IF filter 404a and the second IF filter 404b are the same.

The difference between the two receiving channels is the first used by the first mixer 403a and the second mixer 403b. The vibration frequency is different.

The following describes the process of receiving signals:

The first antenna port 401a and the second antenna port 401b receive the same wireless signal (the same frequency). The signals are amplified by the first LNA 402a and the second LNA 402b, respectively.

The amplified signals enter the first mixer 403a and the second mixer 403b, respectively; since the local frequencies of the first mixer 403a and the second mixer 403b are different, the first mixer 403a and the first The frequency of the signal output by the second mixer 403b is also different.

It should be noted that the antenna port and LNA do not change the frequency of the signal.

Thus, two signals of different frequencies enter the first IF filter 404a and the second IF filter 404b, respectively. The filtered signal is combined in combiner 405. The combiner 405 sends the combined signal to the ADC 406. The ADC 406 performs analog-to-digital conversion on the combined signal and then transmits the converted digital signal to the digital module 407.

In order to enable those skilled in the art to better understand and practice the present invention, the receiving process of the signals will be described in detail below.

Referring to Figure 5, there is shown a frequency diagram of an LNA output signal according to another embodiment of the present invention. It is assumed that the frequency of the wireless signal at the first antenna port 401a and the second antenna port 401b is Frf. The signal of frequency Frf passes through the first LNA 402a and the second LNA 402b and is Fsl and Fs2, respectively. Since the LNA does not change the frequency of the signal, the frequencies of the signals Fsl and Fs2 are the same, or Frf o as shown in Fig. 5.

Referring to Figure 6, there is shown a frequency diagram of a mixer output signal according to another embodiment of the present invention.

The first mixer 403a and the second mixer 403b mix the signals using the local oscillator frequencies Flol and Flo2, respectively.

That is, the signal Fsl is mixed by the local oscillation frequency Flol, and the signal Fs2 is mixed by the local oscillation frequency Flo2.

Since the frequencies of the signals Fsl and Fs2 are the same, they are all Frf, therefore, the signal is mixed during mixing. Fsl and Fs2 use different local oscillator frequencies Flol and Flo2. In this way, it is guaranteed that the frequency of the signal after mixing is not the same. As shown in FIG. 6, the frequency of the mixed signals is Fifl and Fif2, respectively.

The signals having the frequencies Fifl and Fif2 respectively pass through the first IF filter 404a and the second IF filter 404b, and then enter the combiner 405 for combining.

The two receiving devices provided in this embodiment share one ADC, which avoids the use of two independent ADCs in the prior art, thereby simplifying the circuit structure and reducing the cost of the system.

It should be noted that the ADC in the multiple receiving channel provided by the embodiment of the present invention does not specifically limit its working clock, as long as the sampling of each signal can be satisfied. That is, all the IF signals after the combination are guaranteed to be in one sampling area.

It should be noted that the frequencies of the wireless signals received by the above two antenna ports are the same, so different local oscillator frequencies are used. It can be understood that when the frequencies of the wireless signals received by the two antenna ports are different, the same or different local oscillator frequencies can be used, as long as the frequencies of the two signals after the mixing are different.

The multi-channel receiving apparatus provided by the embodiments of the present invention can be applied to all wireless communication technologies, for example, in a mobile communication system, and can also be used in systems such as fixed wireless access, wireless data transmission, and radar.

In summary, in the multi-channel receiving device provided by the embodiment of the present invention, the multiple receiving channels share an ADC, and the signals from the respective IF filters are combined by the combiner and then sent to the ADC. In this way, the ADC performs analog-to-digital conversion on the combined signal and sends it to the digital module. Since only one ADC is used for the multiple receive channels, only one ADC communicates with the digital module. This simplifies the circuit structure and reduces the overall cost of the system.

It should be noted that the embodiment of the present invention further provides a receiver, including any one of the multiple receiving apparatuses provided in the foregoing embodiments.

The embodiment of the present invention further provides a base station, including any one of the receivers provided in the foregoing embodiments.

It will be apparent to those skilled in the art that, for the convenience and brevity of the description, the above For the specific working process of the system, the device and the unit, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solution of the present invention in essence or contribution to the prior art may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. . The above description is only a preferred embodiment of the invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above, or modify the equivalents of equivalent changes without departing from the scope of the technical solutions of the present invention. Example. Therefore, any simple modifications, equivalent changes, and modifications of the above embodiments may be made without departing from the spirit and scope of the invention.

Claims

Rights request

What is claimed is: 1. A multiple receiving device, comprising: an antenna port, a low noise amplifier (LNA), a mixer, an intermediate frequency filter, a combiner, a digital to analog converter (ADC), and a digital module; The number of antenna ports, LNAs, mixers, and IF filters is the same, and at least two.

The combiner, the ADC and the digital module are all one;

The antenna port is configured to receive a wireless signal, and send the received wireless signal to the LNA; the LNA is configured to amplify the wireless signal, and send the amplified signal to the mixer;

The mixer is configured to mix the received signals, and send the mixed signals to the intermediate frequency filter;

The intermediate frequency filter is configured to perform intermediate frequency filtering on the received signal, and send the intermediate frequency filtered signal to the combiner;

The combiner is configured to receive signals sent by at least two of the intermediate frequency filters, and combine the received signals and send the signals to the ADC;

The ADC is configured to perform analog-to-digital conversion on the received signal to the digital module.

2. The multiple receiving device according to claim 1, wherein each of the antenna ports receives the same signal frequency, and each of the mixers uses a different local oscillator frequency.

3. The multiple receiving apparatus according to claim 1, wherein each of the antenna ports receives a different signal frequency, and the same or different local oscillator frequencies are used in each of the mixers.

The multiplex receiving apparatus according to claim 1, wherein the antenna port, the LNA, the mixer, and the intermediate frequency filter are both;

The output signals of the two intermediate frequency filters are sent to the combiner, and the combiner combines the two signals and sends the signals to the ADC. The ADC performs analog-to-digital conversion on the two signals. Send to the digital module.

5. The multiple receiving apparatus according to claim 4, wherein both of the antenna ports receive signals of the same frequency, and different mixing frequencies of the two of the mixers are used.

6. The multiplex receiving apparatus according to claim 4, wherein the two antenna ports respectively receive signals of different frequencies, and the two or the same mixers use the same or different local oscillator frequencies.

A receiver, comprising the multiplex receiving apparatus according to any one of claims 1-6.

A base station, comprising the receiver of claim 7.