CN115189705A - Determination method of wireless reception parameters, dual-mode communication method and system thereof - Google Patents

Abstract

The invention relates to the field of communication, and discloses a method for determining wireless receiving parameters, a dual-mode communication method and a system thereof. The determination method comprises the following steps: transmitting the leader sequence by the HPLC path in a specific frequency band; receiving a plurality of data groups by an HRF path in a zero intermediate frequency mode, and transforming the received data groups to obtain a plurality of frequency domain data groups, wherein in the zero intermediate frequency mode, a cut-off frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups comprise interference signals of a preamble sequence transmitting process to the data groups; and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the receiving process in a low-intermediate frequency mode according to the cut-off frequency, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option. The invention can effectively reduce the influence of the bandwidth and the out-of-band leakage of direct current and HPLC signals on the HRF, namely, the interference of a wired channel on a wireless channel is reduced to the maximum extent.

Description

Determination method of wireless reception parameters, dual-mode communication method and system thereof

technical field

The present invention relates to the field of communications, in particular to a method for determining wireless reception parameters, a dual-mode communication method and a system thereof.

Background technique

High-speed power line communication (HPLC) is a wired communication technology that utilizes power wiring to transmit and receive communication signals. Because the power line network is widely distributed, using the power line as a communication medium does not need to re-build the communication network by drilling holes in the room. It has the advantages of low cost and convenient connection. It has received more and more attention in smart grid and broadband access. The performance of power line communication is mainly restricted by the power line communication channel. Due to the characteristics of various distribution network structures, complex load conditions, and complex equipment types, isolated nodes appear in the network. In addition, with the increase in the types of grid services and the complexity of the use environment, reliable and stable communication has also become critical. In order to solve the information island and ensure the reliability and stability of communication, HPLC_HRF (HRF: high-speed wireless communication) dual-mode communication (ie wired and wireless dual-mode communication) has attracted more and more attention.

The HPLC_HRF dual-mode communication system can be a burst ad hoc network communication system. Wired communication and wireless communication coexist in the network. Each node cannot completely determine whether other nodes send wired HPLC or wireless HRF. The wired and wireless channels must monitor the communication channel in real time to ensure signal reception, improvement of networking speed, and reliability of route maintenance and update. However, in the communication process, the same node will receive wired and wireless reception at the same time. Since HPLC_HRF is a burst asynchronous system, some nodes may also receive wireless or wired data when they transmit wired or wirelessly. The HPLC_HRF system belongs to a single-network dual-channel system, that is, the upper layer adopts a set of protocol software for network and application maintenance, and the bottom layer adopts wired and wireless independent channels. In chip design, in order to save chip cost and module cost, a single-chip solution is generally adopted, that is, the wired and wireless functions and the functions of the upper-layer protocol software are simultaneously completed on the same chip.

For HPLC, baseband signals are used for communication, and the bandwidth includes 4 bandwidths/bands Band0, Band1, Band2, and Band3 as shown in Table 1; for HRF, 3 bandwidth options Option1, Option2, and Option3 as shown in Table 2 are used. For wireless transmission, the bandwidth Option1, Option2 or Option3 baseband signal is upconverted to the carrier frequency (in the range of 470MHz~510MHz), and the receiving side adopts the zero-IF scheme to directly downconvert the signal to the baseband signal. In order to avoid the interference of the DC component in the zero-IF reception to the useful signal, the low-IF scheme is used to down-convert the signal to an intermediate-frequency signal with a certain center frequency Fm and a certain intermediate-frequency bandwidth Bm, and then digitally down-convert to the baseband signal. When the node performs wired transmission and wireless reception at the same time, inside the chip, the transmitted wired signal will be coupled to the intermediate frequency of the wireless receiving path through the power supply or other circuits; similarly, when the node simultaneously performs wired reception and wireless When receiving, the received wired signal may also be coupled to the intermediate frequency of the wireless receiving path through a power supply or other circuit. As shown in Figure 1, if the center frequency of the intermediate frequency is unreasonably selected, as well as the harmonics generated by the leaked wired signal, it will cause interference to the wireless received signal in the band. After the HRF wireless signal is attenuated by the channel (the maximum transmit power of Option3 is about -36dBm/Hz, and the maximum transmit power of Option2 is -40dBm/Hz), it may reach -166dBm/Hz. The out-of-band power requirement of the wired signal can be satisfied at -75dBm/Hz. If the out-of-band leakage of the wired signal is coupled into the bandwidth of the wireless signal, the receiving sensitivity will be drastically deteriorated. In addition, the reception performance will also be affected due to the presence of DC. The maximum bandwidth that can be isolated between wireless and wired depends on the actual band and option used, and it may be relatively narrow. In order to reduce the complexity of filter design for simulation, high-pass and low-pass filters with relatively low series are generally selected. After the wired signal is coupled by the circuit, multiple harmonics of the interfering signal may also appear, which will increase the impact on the wireless signal. Therefore, for the center frequency of the IF, the design of the IF bandwidth becomes crucial. As shown in Figure 1, the DC interferes with the out-of-band portion of the HRF signal of the HPLC signal. The unreasonable design of the center frequency and bandwidth of the IF causes the IF signals of HPLC and HRF to overlap and influence each other, as shown in Figure 2. If the center frequency of the intermediate frequency is designed to be close to DC, although the impact of HPLC on HRF becomes smaller, the impact of DC will become serious again, as shown in Figure 3.

Table 1. HPLC baseband frequency range and effective bandwidth.

Table 2. HRF bandwidth.

For a general IF receiver, if a fixed IF and IF bandwidth are used, the spectrum area corresponding to the IF frequency point and the IF bandwidth cannot be guaranteed to be the optimal receiving area; when using variable IF and variable IF bandwidth, only the influence of DC is considered, while No consideration is given to the effect of using an unreasonable IF frequency point to cause the end boundary of the wireless bandwidth to be closer to the actual boundary of the wired bandwidth, or to overlap directly.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for determining wireless reception parameters, a dual-mode communication method and a system thereof, which can configure the optimal intermediate frequency point in wireless communication according to the wired and wireless bandwidths used, thereby effectively reducing DC And the influence of the bandwidth of the HPLC signal and the out-of-band leakage on the HRF, that is, the interference of the wired channel to the wireless channel is minimized.

In order to achieve the above object, a first aspect of the present invention provides a method for determining wireless reception parameters, the determining method includes: sending a preamble sequence in a specific frequency band by an HPLC channel; receiving a plurality of data groups in a zero-IF mode by an HRF channel, and Transform the received multiple data sets to obtain multiple frequency domain data sets, wherein, in the zero-IF mode, the cut-off frequency of the low-pass filter used is the starting frequency of the specific frequency band, and the The data group includes the interference signal of the transmission process of the preamble sequence to the reception process of the data group; and the intermediate frequency bandwidth according to the cutoff frequency of the low-pass filter, the plurality of frequency-domain data groups and each bandwidth option , and determine the optimal intermediate frequency frequency point of the HRF channel under each bandwidth option in the process of receiving in the low intermediate frequency manner.

Preferably, the determining an optimal intermediate frequency point of the HRF channel under each bandwidth option in the receiving process in a low intermediate frequency manner includes: according to the cutoff frequency of the low-pass filter and the each bandwidth IF bandwidth under the options, determine the number of IF frequency points under each bandwidth option; according to the multiple data segments divided by each frequency domain data group and the IF bandwidth under each bandwidth option, determine The average of the segments under each bandwidth option centered on the intermediate frequency point in each data segment and with the intermediate frequency band under each bandwidth option as the width in the multiple frequency-domain data groups power, wherein the number of the plurality of data segments is equal to the number of IF frequency points under each bandwidth option; In the case where the average power in the multiple frequency-domain data sets of the segment with the width is the minimum value, the IF frequency point is determined as the optimal IF frequency point under the bandwidth option.

Preferably, the determining of the segment under each bandwidth option centered on the intermediate frequency point in each data segment and with the intermediate frequency band under each bandwidth option as the width is performed in the plurality of frequency bands. The average power in the domain data group includes: determining the intermediate frequency frequency point in each data segment according to a plurality of data segments divided by each frequency domain data group; The plurality of data segments, the IF bandwidth under each bandwidth option, and the IF frequency point in each of the multiple data segments, determine the IF under each bandwidth option with each data segment The average power of the segment with the IF frequency point in the segment as the center and the IF frequency band under each bandwidth option as the width.

Preferably, the determining the average power of the segment under each bandwidth option centered on the intermediate frequency point in each data segment and with the intermediate frequency band under each bandwidth option as the width comprises: according to The k -th sampled data R(l, k) in the l -th frequency-domain data group, the number L of the multiple frequency-domain data groups, the intermediate frequency bandwidth Bm ( OptIdx ) under each bandwidth option, the The intermediate frequency point fk(n) in the nth data segment in the lth frequency domain data group and the following formula, determine the intermediate frequency point in each data segment under each bandwidth option as the center and the The IF band under each bandwidth option is the average power of the segment of the width,

，

,

Among them, Bk=Bm( OptIdx )/2.

Through the above technical solutions, the present invention creatively transmits the preamble sequence in a specific frequency band through the HPLC channel; receives multiple data groups in a zero-IF mode through the HRF channel, and transforms the received multiple data groups to obtain multiple frequency domain data and determining the each of the HRF paths in the process of receiving in the low-IF mode according to the cut-off frequency of the low-pass filter, the plurality of frequency-domain data groups, and the intermediate frequency bandwidth under each bandwidth option The optimal IF frequency point under the bandwidth option, so that the optimal IF frequency point in wireless communication can be configured according to the wired and wireless bandwidth used, which can effectively reduce the bandwidth and out-of-band leakage of DC and HPLC signals. The effect is to minimize the interference of the wired path to the wireless path.

A second aspect of the present invention provides a dual-mode communication method. The dual-mode communication method includes: according to a specific frequency band to be used by the HPLC channel and a specific bandwidth option to be used by the HRF channel, determining from an optimal configuration table to use the HRF channel. The specific optimal IF frequency point and specific IF bandwidth, wherein, the optimal configuration table includes: the frequency band adopted by the HPLC channel and the bandwidth option adopted by the HRF channel, the IF bandwidth and the parameters determined according to the method for determining the wireless reception parameters. The correspondence between the optimal intermediate frequency points; and the specific frequency band is used for communication by the HPLC channel; and the specific optimal intermediate frequency frequency point and the specific intermediate frequency bandwidth are used by the HRF channel in a low intermediate frequency manner to receive.

Through the above technical solution, the present invention can creatively determine the optimal intermediate frequency point and intermediate frequency bandwidth in wireless communication from the optimal configuration table according to the frequency band and HRF bandwidth of the HPLC, and in the process of using the frequency band for the HPLC channel for communication, The HRF channel uses the determined optimal IF frequency point and IF bandwidth to receive data in a low-IF mode, which can effectively reduce the impact of the bandwidth of DC and HPLC signals and out-of-band leakage on HRF, that is, minimize the impact of wired communication. interference to the wireless channel.

A third aspect of the present invention provides a system for determining wireless reception parameters, the determining system includes: a sending device for sending a preamble sequence in a specific frequency band by an HPLC channel; a receiving device for receiving a multi-frequency signal from the HRF channel in a zero-IF mode In the zero-IF mode, the cut-off frequency of the low-pass filter used is the starting frequency of the specific frequency band. an initial frequency, and the data group includes an interference signal of the transmission process of the preamble sequence to the reception process of the data group; and an intermediate frequency frequency point determination device, for The frequency domain data group and the intermediate frequency bandwidth under each bandwidth option determine the optimal intermediate frequency frequency point of the HRF channel under each bandwidth option in the process of receiving in the low intermediate frequency manner.

Preferably, the device for determining the intermediate frequency point includes: a number determining module, configured to determine the intermediate frequency under each bandwidth option according to the cutoff frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option. The number of frequency points; the power determination module is used to determine the number of frequency points under each bandwidth option according to the multiple data segments divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option. The average power of a segment in the multiple frequency-domain data groups with the intermediate frequency point in the data segments as the center and the intermediate frequency band under each bandwidth option as the width, wherein the multiple data segments The number is equal to the number of IF frequency points under each bandwidth option; and the IF frequency point determination module is used to center an IF frequency point under a bandwidth option and take the IF band under the bandwidth option as When the average power of the width of the segment is the minimum value in the multiple frequency domain data groups, the intermediate frequency frequency point is determined as the optimal intermediate frequency frequency point under the bandwidth option.

Preferably, the power determination module includes: an intermediate frequency frequency point determination unit, configured to determine the intermediate frequency frequency point in each data segment according to a plurality of data segments divided by each frequency domain data group; and the power a determining unit, configured to determine according to the multiple data segments in each frequency domain data group, the intermediate frequency bandwidth under each bandwidth option, and the intermediate frequency frequency in each of the multiple data segments point, and determine the average power of the segment under each bandwidth option with the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width.

For the specific details and benefits of the system for determining wireless reception parameters provided by the present invention, reference may be made to the above description of the method for determining wireless reception parameters, which will not be repeated here.

A fourth aspect of the present invention provides a dual-mode communication system, the dual-mode communication system includes: a parameter determination device, configured to select from an optimal configuration table according to a specific frequency band to be used by the HPLC channel and a specific bandwidth option to be used by the HRF channel Determine the specific optimal IF frequency point and specific IF bandwidth to be used by the HRF path, wherein the optimal configuration table includes: the frequency band used by the HPLC path and the bandwidth option used by the HRF path, the IF bandwidth and the wireless receiver according to the described The corresponding relationship between the optimal intermediate frequency frequency points determined by the method for determining parameters; and a first communication module for using the specific frequency band to communicate by the HPLC channel; and a second communication module for the HRF channel The channel uses the specific optimal IF frequency point and the specific IF bandwidth to receive in a low-IF manner.

For the specific details and benefits of the dual-mode communication system provided by the present invention, reference may be made to the above description of the dual-mode communication method, which will not be repeated here.

A fifth aspect of the present invention provides a chip for executing an instruction, and when the instruction is executed by the chip, the method for determining the wireless reception parameter and/or the dual-mode communication method is implemented.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and are used to explain the embodiments of the present invention together with the following specific embodiments, but do not constitute limitations to the embodiments of the present invention. In the attached image:

Fig. 1 is a schematic diagram of the influence of HPLC out-of-band signal and direct current on HRF signal;

Fig. 2 is a schematic diagram of the effect of HPLC signal and HRF signal aliasing on HRF signal;

Fig. 3 is the schematic diagram of the influence of direct current on HRF signal;

4A is a flowchart of a method for determining wireless reception parameters provided by an embodiment of the present invention;

4B is a flowchart of determining an optimal intermediate frequency frequency point of the HRF path under each bandwidth option in the process of receiving in a low intermediate frequency manner according to an embodiment of the present invention;

5 is a schematic structural diagram of a dual-mode communication system provided by an embodiment of the present invention;

FIG. 6 is a flowchart of an optimal configuration acquisition process provided by an embodiment of the present invention; and

FIG. 7 is a flowchart of a dual-mode communication method provided by an embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

FIG. 4A is a flowchart of a method for determining wireless reception parameters provided by an embodiment of the present invention. As shown in FIG. 4A , the determination method may include the following steps S401-S403.

Step S401, the HPLC channel sends the preamble sequence in a specific frequency band.

According to the system configuration provided by the main control module 20 (as shown in Table 3), the HPLC channel module 10 performs the transmission and reception data processing of the wired channel, as shown in FIG. 5 . During the optimal configuration acquisition process (for example, the optimal configuration table acquisition process), the HPLC channel module 10 can continue to send a fixed preamble sequence to ensure that the HRF channel receives data interfered by the HPLC channel.

Table 3. Key configuration information for the HPLC pathway module.

The HPLC channel module 10 performs the transceiving operation through the status indication and the frequency band (Band) configured by the main control module 20 . When the status indication is the optimal configuration acquisition process, the HPLC channel module 10 performs uninterrupted preamble transmission under the configuration Band; when the status indication is the normal working process of the system, the HPLC channel module 10 performs normal data reception and transmission under the configuration Band. send.

In step S402, the HRF channel receives multiple data sets in a zero-IF mode, and transforms the received multiple data sets to obtain multiple frequency domain data sets.

Wherein, in the zero-IF mode, the cut-off frequency of the low-pass filter used is the starting frequency of the specific frequency band, and the data group includes the interference of the transmission process of the preamble sequence to the reception process of the data group Signal.

The length of the data group is determined by the sampling rate and sampling time of the HRF channel. The sampling rate needs to be greater than or equal to the start frequency of the specific frequency band, and the sampling time needs to be greater than or equal to the time length of an OFDM symbol (of HRF). For example, the sampling frequency may be 6.25MHz, the time length of the OFDM symbol whose sampling time is HRF is 122.88us, and the length of each data group is 6.25MHz*122.88us=768.

The HRF channel module 30 performs the sending and receiving data processing of the wireless channel according to the system configuration provided by the main control module 20 (as shown in Table 4), as shown in FIG. 5 . When the state indicates the optimal configuration acquisition process, the HRF channel module 30 uses the starting frequency of the Band of the HPLC (for example, the starting frequency of Band 3 in Table 1 is 1.758MHz, usually 1.7MHz) as the low-pass filter. Bandwidth configuration (i.e. cutoff frequency), zero-IF reception is performed, and the received data is transformed into the frequency domain. When the state indicates that the system is working normally, the HRF channel module 30 receives the HRF signal under the optimal receiving configuration corresponding to the bandwidth option (Option).

Table 4. HRF Pathway Module key configuration information.

Specifically, in the process of obtaining the optimal configuration, multiple data groups are received by the HRF channel in a zero-IF manner, wherein each data group includes the transmission process (wired transmission) of the preamble sequence and the reception process (wireless transmission) of the data group. received), and then transform the received multiple data sets to obtain multiple frequency domain data sets corresponding to the multiple data sets.

Step S403, according to the cut-off frequency of the low-pass filter, the multiple frequency-domain data groups, and the intermediate frequency bandwidth under each bandwidth option, determine the each of the HRF channels in the process of receiving in the low-IF mode. The optimal IF frequency point under the bandwidth option.

For the IF frequency point and IF bandwidth of HRF, there are the following restrictions:

A. If the IF frequency point supported by the RF front-end of the HRF is too high, the digital front-end of the HRF must support a relatively high digital sampling rate;

b. If the setting of the IF frequency point and IF bandwidth of HRF causes overlap with the bandwidth of Band used by HPLC, it will cause wired-to-wireless interference;

c. If the IF bandwidth of the HRF is set too narrow, it will inevitably lead to difficulties in designing the front-end filter.

Based on the above problems and a convenient way to deal with it, this embodiment recommends that the IF frequency of the HRF be within 0MHz~2MHz, and the IF bandwidth can be set within 0.2MHz, 0.5MHz, and 1MHz, as shown in Table 4.

Set the IF frequency according to 0MHz~2MHz to ensure that under various options, the optimal detection range will not exceed the limit of the maximum IF frequency point and IF bandwidth, that is, the maximum detection frequency is Fm+Bm/2.

Setting the IF bandwidth according to the bandwidth interval reduces the bandwidth requirements for filter design on the one hand, and on the other hand, preserves the guard sideband to reduce out-of-band interference.

For step S403, the determining the optimal intermediate frequency point of the HRF channel under each bandwidth option in the low intermediate frequency receiving process may include the following steps S4031-S4033, as shown in FIG. 4B.

The optimal detection module 40 in FIG. 5 only works during the optimal configuration acquisition process, and is turned off in other states. In the Band designated by the main control module 20 and the zero-IF receiving bandwidth option, take the IF frequency point as the center and the IF bandwidth as the interval, perform segment power calculation, and select the IF frequency point corresponding to the segment with the smallest power as the optimal configuration , and report it to the main control module 20 . As defined by the design of the HRF channel module 30 above, the IF frequency of the HRF is set within 0MHz~2MHz, and the IF bandwidth is selected from 0.2MHz (Option3), 0.5MHz (Option2), and 1MHz (Option1). For different combinations of Band and Option, the detected IF frequency range is shown in Table 5, accurate to 0.1MHz. The key configuration information of the optimal detection module 40 by the main control module 20 is shown in Table 6.

Table 5. HRF IF frequency range.

Table 6. Optimal detection key configuration information.

Let OptIdx represent the index of Option to be traversed, and the values 1, 2, and 3 represent Option1, Option2, and Option3, respectively. The working process of the optimal detection module 40 in FIG. 5 is as follows.

Step S4031: Determine the number of intermediate frequency points under each bandwidth option according to the cutoff frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option.

The process of determining the number of intermediate frequency points under each bandwidth option mainly includes the following two cases.

(1) For RF with any configurable intermediate frequency, according to the cutoff frequency Bw of the low-pass filter and the intermediate frequency bandwidth Bm ( OptIdx ) under each bandwidth option, determine the intermediate frequency under each bandwidth option. Number of points:

FmNum( OptIdx )=floor(Bw/Bm( OptIdx )) , (1)

Among them, Bw is determined by the Band of the HPLC configuration, for example, its possible values are 0.7MHz, 1.7MHz, 2MHz; Bm( OptIdx ) represents the IF bandwidth corresponding to OptIdx , which is selected according to Table 5; floor(.) represents the rounding down .

In one embodiment, the HPLC uses a specific frequency band Band3 (for example, 1.758-2.930 MHz shown in Table 1) to continuously send the preamble sequence, and the HRF uses Option2 (for example, 0.5 MHz shown in Table 2) to receive data. Correspondingly, according to the specific frequency band Band3, it can be determined that the cutoff frequency of the low-pass filter adopted by the HRF in the zero-IF mode is 1.7MHz; then according to formula (1), the number of intermediate frequency points under Option2 ( OptIdx is 2) can be determined FmNum (2) is equal to 3.

(2) For the RF whose IF frequency cannot be arbitrarily configured, FmNum is equal to the number of IF frequencies that can be supported by the RF within the HRF IF range, and the IF bandwidth is selected according to Option and Table 5.

According to Table 5, if Option is Option1 and Band is Band2, only zero-IF reception can be used in the normal reception process. Since the use of zero-IF reception in the normal reception process is not an improvement point of the present invention, it can be performed in the existing manner, which will not be repeated here. At this time, the optimal reception mode RecFlag(OptIdx) is set to zero-IF reception (in the normal reception process), that is, RecFlag(OptIdx)=0, as shown in Table 4. In other cases, RecFlag(OptIdx) is set to (during normal reception) low-IF reception, that is, RecFlag(OptIdx)=1, as shown in Table 4.

Step S4032, according to the multiple data segments divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option, determine the intermediate frequency point in each data segment under each bandwidth option. is the average power of a segment centered on the intermediate frequency band under each bandwidth option within the plurality of frequency-domain data sets.

Wherein, the number of the multiple data segments is equal to the number of intermediate frequency points under each bandwidth option.

In the above embodiment, the number FmNum(2) of the intermediate frequency points under option2 is 3, so each frequency domain data group can be divided into 3 data segments, for example (0, 1/3*1.7MHz], ( 1/3*1.7MHz, 2/3*1.7MHz], (2/3*1.7MHz, 1.7MHz].

For step S4032, the determining under each bandwidth option takes the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width in the multiple The average power in the frequency domain data group may include: determining an intermediate frequency frequency point in each data segment according to a plurality of data segments divided by each frequency domain data group; and according to each frequency domain data The plurality of data segments in the group, the IF bandwidth under each bandwidth option, and the IF frequency point in each data segment of the plurality of data segments, determine the number in each bandwidth option under each bandwidth option. The average power of a segment centered on the IF frequency point in each data segment and with the IF frequency band under each bandwidth option as the width.

Wherein, the determining the average power of the segment under each bandwidth option centered on the intermediate frequency point in each data segment and with the intermediate frequency band under each bandwidth option as the width may include: according to The k -th sampled data R(l, k) in the l -th frequency-domain data group, the number L of the multiple frequency-domain data groups, the intermediate frequency bandwidth Bm ( OptIdx ) under each bandwidth option, the The intermediate frequency point fk(n) in the nth data segment in the lth frequency domain data group and the following formula, determine the intermediate frequency point in each data segment under each bandwidth option as the center and the The IF band under each bandwidth option is the average power of the segment of the width,

，（2）

,(2)

Wherein, Bk=Bm( OptIdx )/2, which represents the number of carriers occupied by Bm( OptIdx )/2.

Taking the above embodiment as an example, HPLC uses a specific frequency band Band3 (such as 1.758-2.930 MHz shown in Table 1) to continuously send preamble sequences, and HRF uses Option2 (such as 0.5 MHz shown in Table 2) to receive data.

3 data segments obtained by dividing each frequency domain data segment (0, 1/3*1.7MHz], (1/3*1.7MHz, 2/3*1.7MHz], (2/3*1.7MHz, 1.7 MHz], the intermediate frequency points (i.e. the center) fk(1), fk(2), and fk(3) in each data segment can be determined respectively. Then, the fk(1), fk(1), fk(1), fk(1), fk(1), Corresponding segments with fk(2), fk(3) as centers and Bm( 2 )=0.5MHz width.

If L=5 data groups are received, three segments in the three data segments corresponding to the lth ( l =0, 1, 2, 3, 4) data group can be extracted according to the above method. Then, according to the frequency domain data R ( l , k ) in the segment corresponding to the first data segment in each data group (the value range of k is [fk(1)-0.25MHz, fk(1) +0.25MHz]) and the above formula (2), the average power P( 2 , 1) in the segment in the first data segment can be determined. Similarly, the average power P( 2 , 2) within the segment in the 2nd data segment, and the average power P( 2 , 3) within the segment in the 3rd data segment can be determined.

Step S4033, under a bandwidth option with an intermediate frequency point as the center and the intermediate frequency band under the bandwidth option as the width of the segment under the condition that the average power in the plurality of frequency domain data sets is the minimum value , and determine the IF frequency point as the optimal IF frequency point under this bandwidth option.

，则Option2下的最优中频频点为第n个数据段内的中频频点fk(n)（即Fm(2)=FmList(

)）。例如，若P(2，3)最小，则第3个数据段内的中频频点fk(3)为Option2下的最优中频频点（即Fm(2)=FmList(

)）。Specifically, find the index when P( OptIdx , n) is the smallest

, then the optimal IF frequency point under Option2 is the IF frequency point fk(n) in the nth data segment (that is, Fm( 2 )=FmList(

)). For example, if P( 2 , 3) is the smallest, then the IF frequency point fk(3) in the third data segment is the optimal IF frequency point under Option 2 (that is, Fm( 2 )=FmList(

)).

If all options are traversed, report all estimated RecFlag( OptIdx ), Fm( OptIdx ), Bm( OptIdx ) to the main control module 20 . If all options are not completed, update OptIdx , and return to step S4031 to detect the next option.

As shown in FIG. 5 , the configuration storage module 50 is a memory unit, which stores the optimal configuration of HRF under various Bands and Option. In the process of obtaining the optimal configuration, the main control module 20 stores the optimal configuration evaluated by the optimal detection module 40 in the configuration storage module 50 . When the dual-mode system enters the normal working mode, the main control module 20 searches for the optimal receiving configuration from the configuration storage module 50 according to the configuration of the wired Band and the wireless Option. For the specified Band, the storage format of the configuration storage module 50 is shown in Table 7. Since the starting frequencies of Band0 and Band3 are close, Band0 and Band3 adopt a set of optimal results, so for the Band of HPLC, a total of 3 sets of optimal configurations are required as shown in Table 7 (that is, Band0 and Band1 are a set, Band2 and Band3 are respectively One group). When performing the optimal configuration, the main control module 20 determines the optimal configuration table to be used according to the Band of the HPLC, and then selects the optimal configuration corresponding to the Option from the table.

Table 7. Configuration enclosure storage format.

The optimal configuration acquisition process is briefly described below from the perspective of the main control module 20, as shown in FIG. 6 .

The main control module 20 performs the HPLC Band configuration on the HPLC channel module 10. For specific configuration information, refer to the description of the above-mentioned HPLC channel module (as shown in Table 3). After obtaining the configuration information, the main control module 20 controls the HPLC channel module 10 to specify the Band to continuously send the preamble sequence (as shown in step S601 ).

The main control module 20 performs zero-IF receiving configuration on the HRF channel module 30 according to the HPLC Band. For specific configuration information, refer to the description of the above-mentioned HRF channel module 30 (as shown in Table 4). After obtaining the configuration information, the main control module controls the HRF channel module 30 to receive at zero intermediate frequency (as shown in step S602).

Under the condition of configuring Band, the optimal detection module 40 detects the optimal IF frequency point and IF bandwidth under all Option (as shown in step S603).

The main control module 20 obtains the optimal IF frequency point and IF bandwidth corresponding to the specified Band and different Option, and notifies the configuration storage module 50 for storage (as shown in step S604).

The optimal detection module 40 determines whether all Bands have been traversed (as shown in step S605). If so, the main control module 20 configures the HPLC channel module 10 for the next Band, and repeats the above process until detection under all Band conditions. Otherwise, end the process

Therefore, the main control module 20 determines the optimal receiving configuration under each combination of Band and Option, and stores the optimal receiving configuration in the configuration storage module 50 . For specific configuration information, refer to the description of the configuration storage module 50 above (as shown in Table 7).

In the above embodiment, according to the bandwidths of HPLC and HRF, the optimal intermediate frequency point and intermediate frequency bandwidth that can be used by the node device are determined in advance, and the results are stored in the storage unit. Compared with the traditional receiving method of fixed IF frequency point and IF bandwidth, the optimal receiving parameter settings can be obtained in advance for HPLC_HRF equipment.

To sum up, the present invention creatively transmits the preamble sequence in a specific frequency band through the HPLC channel; receives multiple data sets in a zero-IF mode through the HRF channel, and transforms the received multiple data sets to obtain multiple frequency domain data and determining the each of the HRF paths in the process of receiving in the low-IF mode according to the cut-off frequency of the low-pass filter, the plurality of frequency-domain data groups, and the intermediate frequency bandwidth under each bandwidth option The optimal IF frequency point under the bandwidth option, so that the optimal IF frequency point in wireless communication can be configured according to the wired and wireless bandwidth used, which can effectively reduce the bandwidth and out-of-band leakage of DC and HPLC signals. The effect is to minimize the interference of the wired path to the wireless path.

FIG. 7 is a flowchart of a dual-mode communication method provided by an embodiment of the present invention. As shown in FIG. 7 , the dual-mode communication method may include: Step S701, according to the specific frequency band to be used by the HPLC channel and the specific bandwidth option to be used by the HRF channel, from the optimal configuration table to determine the specific optimal configuration table to be used for the HRF channel. The optimal IF frequency point and the specific IF bandwidth, wherein, the optimal configuration table includes: the frequency band adopted by the HPLC channel and the bandwidth option adopted by the HRF channel, the IF bandwidth and the optimal IF determined according to the method for determining the wireless reception parameters. The corresponding relationship between the frequency points; and step S702, the HPLC channel uses the specific frequency band to communicate; and step S703, the HRF channel uses the specific optimal intermediate frequency frequency point and the specific intermediate frequency bandwidth to communicate with Receive in low-IF mode.

Specifically, in the normal receiving process of the system, the main control module 20 determines the optimal receiving configuration of the HRF according to the dual-mode Band and Option configuration, and configures it to the corresponding module. The specific processing method is as follows.

The main control module 20 performs Band configuration on the HPLC channel module 10. For specific configuration information, refer to the description of the HPLC channel module 10 (as shown in Table 3). After the HPLC channel module 10 obtains the configuration information, it performs normal data transmission and reception processing according to the Band instruction.

The main control module 20 reads the optimal receiving configuration of the HRF from the configuration storage module 50 according to Option and Band, and sends the configuration information to the HRF path module 30. For specific configuration information, refer to the description of the HRF path module (as shown in Table 4). . After the HRF channel module 30 obtains the configuration information, it performs normal data transmission and reception processing according to the optimal configuration information (optimal intermediate frequency point and corresponding intermediate frequency bandwidth) under Option and Band.

To sum up, the present invention can creatively determine the optimal intermediate frequency point and intermediate frequency bandwidth in wireless communication from the optimal configuration table according to the frequency band and HRF bandwidth of HPLC, and in the process of using the frequency band communication process in the HPLC channel, The HRF channel uses the determined optimal IF frequency point and IF bandwidth to receive data in a low-IF mode, which can effectively reduce the impact of the bandwidth of DC and HPLC signals and out-of-band leakage on HRF, that is, minimize the impact of wired communication. interference to the wireless channel.

An embodiment of the present invention provides a system for determining wireless reception parameters. The determining system includes: a sending device, used for sending a preamble sequence in a specific frequency band through an HPLC channel; In the zero-IF mode, the cut-off frequency of the low-pass filter used is the starting frequency of the specific frequency band. an initial frequency, and the data group includes an interference signal of the transmission process of the preamble sequence to the reception process of the data group; and an intermediate frequency frequency point determination device, for The frequency domain data group and the intermediate frequency bandwidth under each bandwidth option determine the optimal intermediate frequency frequency point of the HRF channel under each bandwidth option in the process of receiving in the low intermediate frequency manner.

The transmitting device may be the HPLC channel module 10 in FIG. 5 , the receiving device may be the HRF channel module 30 in FIG. 5 , and the intermediate frequency point determining device may be the optimal detection module 40 in FIG. 5 . . The transmitting device, the receiving device and the intermediate frequency point determining device can be controlled by the main control module 20 .

Preferably, the device for determining the intermediate frequency point includes: a number determining module, configured to determine the intermediate frequency under each bandwidth option according to the cutoff frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option. The number of frequency points; the power determination module is used to determine the number of frequency points under each bandwidth option according to the multiple data segments divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option. The average power of a segment in the multiple frequency-domain data groups with the intermediate frequency point in the data segments as the center and the intermediate frequency band under each bandwidth option as the width, wherein the multiple data segments The number is equal to the number of IF frequency points under each bandwidth option; and the IF frequency point determination module is used to center an IF frequency point under a bandwidth option and take the IF band under the bandwidth option as When the average power of the width of the segment is the minimum value in the multiple frequency domain data groups, the intermediate frequency frequency point is determined as the optimal intermediate frequency frequency point under the bandwidth option.

Preferably, the power determination module includes: an intermediate frequency frequency point determination unit, configured to determine the intermediate frequency frequency point in each data segment according to a plurality of data segments divided by each frequency domain data group; and the power a determining unit, configured to determine according to the multiple data segments in each frequency domain data group, the intermediate frequency bandwidth under each bandwidth option, and the intermediate frequency frequency in each of the multiple data segments point, and determine the average power of the segment under each bandwidth option with the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width.

For the specific details and benefits of the system for determining wireless reception parameters provided by the present invention, reference may be made to the above description of the method for determining wireless reception parameters, which will not be repeated here.

An embodiment of the present invention provides a dual-mode communication system, the dual-mode communication system includes: a parameter determination device, configured to select from an optimal configuration table according to a specific frequency band to be used by the HPLC channel and a specific bandwidth option to be used by the HRF channel Determine the specific optimal IF frequency point and specific IF bandwidth to be used by the HRF path, wherein the optimal configuration table includes: the frequency band used by the HPLC path and the bandwidth option used by the HRF path, the IF bandwidth and the wireless receiver according to the described The corresponding relationship between the optimal intermediate frequency frequency points determined by the method for determining parameters; and a first communication module for using the specific frequency band to communicate by the HPLC channel; and a second communication module for the HRF channel The channel uses the specific optimal IF frequency point and the specific IF bandwidth to receive in a low-IF manner.

For the specific details and benefits of the dual-mode communication system provided by the present invention, reference may be made to the above description of the dual-mode communication method, which will not be repeated here.

An embodiment of the present invention provides a chip for executing an instruction, and when the instruction is executed by the chip, the method for determining the wireless reception parameter and/or the method for dual-mode communication is implemented.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. In order to avoid unnecessary repetition, the present invention provides The combination method will not be specified otherwise.

Those skilled in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium and includes several instructions to make a single-chip microcomputer, a chip or a processor. (processor) executes all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

In addition, the various embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the contents disclosed in the present invention.

Claims (10)

1. A method for determining wireless reception parameters, the method comprising:

transmitting the leader sequence by the HPLC path in a specific frequency band;

receiving a plurality of data groups by an HRF path in a zero intermediate frequency mode, and transforming the received data groups to obtain a plurality of frequency domain data groups, wherein in the zero intermediate frequency mode, a cut-off frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups comprise interference signals of a transmitting process of a preamble sequence to a receiving process of the data groups; and

and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the process of receiving in a low-intermediate frequency mode according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option.

2. The method of claim 1, wherein the determining the optimal if frequency point of the HRF path at each bandwidth option during reception in low if mode comprises:

determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option;

determining the average power of a segment which is divided into a plurality of data segments by each frequency domain data group and has the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups according to the plurality of data segments which are divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and

and under the condition that the average power of the segments which take an intermediate frequency point as the center and an intermediate frequency band under the bandwidth option as the width in the plurality of frequency domain data groups is the minimum value, determining the intermediate frequency point as the optimal intermediate frequency point under the bandwidth option.

3. The method of claim 2, wherein the determining the average power of the segments under each bandwidth option, which are centered around the if frequency point in each data segment and are wide in the if frequency band under each bandwidth option, in the plurality of frequency domain data sets comprises:

determining intermediate frequency points in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and

and determining the average power of the segments under each bandwidth option, which are centered at the intermediate frequency point in each data segment and are wide at the intermediate frequency band under each bandwidth option, according to the plurality of data segments in each frequency domain data group, the intermediate frequency bandwidth under each bandwidth option and the intermediate frequency point in each data segment in the plurality of data segments.

4. The method according to claim 3, wherein the determining the average power of the segment under each bandwidth option, which is centered on the intermediate frequency point in each data segment and is wide in the intermediate frequency band under each bandwidth option, comprises:

according to the firstlWithin a frequency domain data setkA sampling dataR(l，k)Number of the plurality of frequency domain data setsLThe intermediate frequency bandwidth Bm (at each bandwidth option)OptIdx) The first mentionedlDetermining the average power of the segments under each bandwidth option, which take the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width, according to the intermediate frequency point fk (n) in the nth data segment in each frequency domain data group and the following formula,

，

wherein Bk = Bm: (OptIdx)/2。

5. A dual-mode communication method, the dual-mode communication method comprising:

determining a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be adopted by an HRF (high performance liquid chromatography) channel from an optimal configuration table according to a specific frequency band to be adopted by the HPLC channel and a specific bandwidth option to be adopted by the HRF channel, wherein the optimal configuration table comprises: the frequency band adopted by an HPLC channel and the bandwidth options and the intermediate frequency bandwidth adopted by an HRF channel correspond to the optimal intermediate frequency points determined by the method for determining the wireless receiving parameters according to any one of claims 1 to 4; and

communicating by the HPLC pathway using the particular frequency band; and

and the HRF path receives the data in a low-intermediate frequency mode by adopting the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth.

6. A system for determining wireless reception parameters, the system comprising:

a transmitting means for transmitting the preamble sequence in a specific frequency band by the HPLC path;

receiving means, configured to receive multiple data groups in a zero intermediate frequency manner through an HRF path, and transform the received multiple data groups to obtain multiple frequency-domain data groups, where in the zero intermediate frequency manner, a cutoff frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups include interference signals of a receiving process of the data groups in a transmitting process of a preamble sequence; and

and the intermediate frequency point determining device is used for determining the optimal intermediate frequency point of the HRF channel under each bandwidth option in the receiving process in a low-intermediate frequency mode according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data groups and the intermediate frequency bandwidth under each bandwidth option.

7. The system for determining wireless receiving parameters according to claim 6, wherein the device for determining intermediate frequency points comprises:

the number determining module is used for determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option;

the power determining module is used for determining the average power of the segments which are divided into a plurality of data segments by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option and take the intermediate frequency point in each data segment as the center and the intermediate frequency bandwidth under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and

and the intermediate frequency point determining module is used for determining the intermediate frequency point as the optimal intermediate frequency point under a bandwidth option under the condition that the average power of the segments which take the intermediate frequency point under the bandwidth option as the center and the intermediate frequency band under the bandwidth option as the width in the plurality of frequency domain data groups is the minimum value.

8. The system for determining wireless reception parameters of claim 7, wherein the power determination module comprises:

the intermediate frequency point determining unit is used for determining the intermediate frequency point in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and

and a power determining unit, configured to determine, according to the multiple data segments in each frequency domain data group, the intermediate frequency bandwidth in each bandwidth option, and the intermediate frequency point in each data segment in the multiple data segments, an average power of a segment in each bandwidth option, where the segment is centered at the intermediate frequency point in each data segment and the segment is wide at the intermediate frequency band in each bandwidth option.

9. A dual-mode communication system, the dual-mode communication system comprising:

a parameter determining device, configured to determine, according to a specific frequency band to be used by an HPLC channel and a specific bandwidth option to be used by an HRF channel, a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be used by the HRF channel from an optimal configuration table, where the optimal configuration table includes: the frequency band adopted by an HPLC channel and the bandwidth options and the intermediate frequency bandwidth adopted by an HRF channel correspond to the optimal intermediate frequency points determined by the method for determining the wireless receiving parameters according to any one of claims 1 to 4; and

a first communication module for communicating by the HPLC path using the specific frequency band; and

and the second communication module is used for receiving the HRF channel by adopting the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth in a low-intermediate frequency mode.

10. A chip for executing instructions which, when executed by the chip, implement the method for determining wireless reception parameters of any one of claims 1 to 4 and/or the dual-mode communication method of claim 5.

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