Method of estimating error rate of unknown signal, method of validating unknown signal, use of validated signal and receiver architecture system

Abstract

The invention relates to a method for estimating the error rate of an unknown signal. A portion of the signal is measured and demodulated a plurality of times to obtain a plurality of demodulated signal portions, each having at least one symbol. The symbols of the plurality of demodulated signal portions are evaluated, thereby obtaining at least one evaluation result. An error rate is estimated based on the at least one evaluation result. Further, a method of validating unknown signals, use of validated signals, and a receiver architecture system are described.

Description

Technical Field

[0001] The present invention relates to a method for estimating the error rate of an unknown signal. Furthermore, the present invention relates to a method for verifying an unknown signal. Furthermore, the present invention relates to the use of the verified signal and a receiver architecture system for receiving and processing an unknown signal. Background Art

[0002] In the prior art, it is known to determine error rates such as bit error rate (BER) or symbol error rate (SER). However, the measurements known in the prior art require consideration of a known reference, i.e., the definition of symbols (e.g., pseudo-random binary sequence (PRBS)), or a recording of the corresponding signal in a clean manner (i.e., without any symbol errors). Thus, the actually captured signal can be compared with the reference in order to determine the error rate.

[0003] However, the known methods have several limitations for determining the corresponding error rate.

[0004] For example, it is not possible to perform encoding before measuring the error rate, yet this is a requirement of many customers in the technical field in order to also consider any effects of encoding. Furthermore, recording and comparing long sequences require an unacceptable amount of time.

[0005] Therefore, there is a need for an improved method to determine the error rate in an efficient manner while overcoming the above-mentioned drawbacks. Summary of the Invention

[0006] The following summary of the disclosure is intended to introduce different concepts in a simplified form that are further described in detail in the detailed description provided below. This summary is neither intended to represent the basic features of the disclosure nor should this summary be used to assist in determining the scope of the claimed subject matter.

[0007] The present invention provides a method for estimating the error rate of an unknown signal. The method includes the following steps:

[0008] - Measuring and demodulating a part of the signal multiple times, thereby obtaining a plurality of demodulated signal parts, each demodulated signal part having at least one symbol,

[0009] - Evaluating the symbols of the plurality of demodulated signal parts, thereby obtaining at least one evaluation result, and

[0010] - Estimating the error rate based on at least one evaluation result.

[0011] The main idea of the present invention is to capture the same signal (especially a part thereof) multiple times (N times), thereby obtaining multiple measurements / captures, based on which error rate measurements can be performed. The error rate measurements can be carried out on any given signal, i.e., an unknown signal. Therefore, it is not necessary to have a known reference a priori. This differentiates the method according to the present invention from the methods known in the prior art. In other words, the error rate can be determined without knowing the actually transmitted bits / symbols. In fact, the method according to the present invention is based on measuring the same sequence or rather a part of the signal multiple times.

[0012] When the signal is captured multiple times, at least one symbol is obtained for each of the multiple demodulated signal parts. This symbol for each of the multiple demodulated signal parts can be used to determine the error rate.

[0013] One aspect provides estimating the error rate for each of the multiple demodulated signal parts separately, such that multiple error rates are obtained, i.e., the error rate for each demodulated signal part. During the step of evaluating the symbols of the multiple demodulated signal parts, multiple error rates can be obtained for each of the demodulated signal parts.

[0014] The error rate can be the bit error rate (BER) or the symbol error rate (SER).

[0015] In addition, the present invention provides a method for verifying an unknown signal. The method includes the following steps:

[0016] - Measuring and demodulating a part of the signal multiple times, thereby obtaining multiple demodulated signal parts each having at least one symbol,

[0017] - Evaluating the symbols of the multiple demodulated signal parts, thereby obtaining at least one evaluation result, and

[0018] - Verifying the signal as a reference signal based on the at least one obtained evaluation result.

[0019] Therefore, these steps can also be performed to verify an unknown signal as a reference signal. This can be ensured by determining whether there is an error rate. Assuming no error is detected, the unknown signal can be verified as a reference signal.

[0020] Each demodulated signal part can include multiple symbols. Thus, a symbol sequence for each demodulated signal part is obtained, where each symbol of the symbol sequence is associated with a defined time instance (also referred to as symbol time). Therefore, more than one symbol can be obtained and processed for each demodulated signal part for determining the error rate or verifying the signal as a reference signal.

[0021] For example, a time reference is used to define the first symbol in the symbols of the demodulated signal portion respectively. For example, the start of a frame, a trigger, a burst, a pattern, or the like can be used to define the first symbol in the symbols of each demodulated signal portion, that is, the first symbol of the symbol sequence. Thus, a comparison time reference for the symbols of each demodulated signal portion is obtained, enabling the obtained symbol sequences to be compared with each other in a timely manner. This allows the demodulated signal portions to be compared, particularly their respective symbols. The definition of the first symbol ensures the symbol time is defined accordingly.

[0022] The symbols of the demodulated signal portions can be compared with each other at defined time instances. The defined time instances are related to a certain symbol time. Possible phase ambiguities can be considered to ensure that the demodulated signal portions can be compared with each other in a phase-corrected manner. In fact, for each defined time instance, that is, for the corresponding symbol time, the symbols of the demodulated signal portions can be compared with each other. In other words, the corresponding first symbols of all demodulated signal portions can be compared with each other, the corresponding second symbols of all demodulated signal portions can be compared with each other, and so on.

[0023] In particular, a histogram is created for each defined time instance to determine the correct symbol at the corresponding time instance (i.e., symbol time). Since multiple symbols at the same time instance are obtained by capturing the same signal (portion) multiple times, a distribution of the symbols, such as their values, can be created through the histogram. Thus, the histogram provides the distribution of the symbols at the corresponding time instance. Based on this distribution, the correct symbol can be estimated, for example, the symbol that appears most frequently in the histogram for the corresponding time instance.

[0024] A histogram can be created for each defined time instance. Thus, histograms are created for all time instances, that is, for each symbol of the symbol sequence. Therefore, the correct symbol can be estimated for all time instances based on the corresponding histograms. In other words, at each symbol time, the (possibly) correct symbol is derived from the corresponding histogram created.

[0025] Generally, the deviation of the symbol of a certain demodulated signal portion from the (possibly) correct symbol derived from the corresponding histogram is estimated as an error. Based on this, the error rate can be estimated separately for each demodulated signal portion.

[0026] In fact, the reference can be estimated based on the capture, that is, based on the multiple demodulated signal portions obtained, particularly the histograms derived therefrom. Similarly, no prior reference is required because the reference used to determine the error rate is derived from the capture (such as a histogram) of an unknown signal.

[0027] The symbols of each of a plurality of demodulated signal portions can be evaluated. As described above, a reference can be determined based on the symbols of each of the plurality of demodulated signal portions, in particular the histograms derived therefrom. Further, the respective symbols of the plurality of demodulated signal portions can be compared with corresponding reference symbols at a specific symbol time (i.e., the symbols that occur most frequently in the histogram for a defined time instance (symbol time)).

[0028] As an alternative to the histogram, (potentially) correct symbols can be derived by comparing the symbols of the plurality of demodulated signal portions at the same time instance (same symbol time).

[0029] Since the signal, in particular at least a part thereof, is captured multiple times (N times), statistical deviations that may cause errors can be identified.

[0030] In addition, the symbols of the plurality of demodulated signal portions can be evaluated by selecting at least one specific symbol, and at least one evaluation result is obtained based on the at least one specific symbol. The specific symbol can be selected during the evaluation of the plurality of symbols associated with the plurality of demodulated signal portions. For example, the at least one specific symbol is the symbol that occurs most frequently at the corresponding symbol time (time instance). This can be easily determined by comparing the corresponding symbols of the demodulated signal portions at the same symbol time.

[0031] For example, the at least one specific symbol is a symbol that is considered to be an error. In the case where the comparison of the symbols of the plurality of demodulated signal portions provides a certain symbol in one demodulated signal portion that is different from the symbol of the demodulated signal portion at the same symbol time, the specific symbol can be particularly used for evaluation.

[0032] In particular, in order to obtain at least one evaluation result, the adjacent symbols of the at least one specific symbol are also considered. Thus, the symbol considered to be an error and its (direct) adjacent symbols, i.e., the one or more previous symbols and the one or more subsequent symbols thereof, are also taken into account. For example, constellation points can be examined in order to evaluate the symbols of the demodulated signal portions in order to obtain at least one evaluation result.

[0033] For example, this part of the signal is measured and demodulated in parallel by a parallel hardware architecture. Thus, the signal can relate to a real-world signal that is processed in parallel by a plurality of receive paths. The real-world signal can be a non-repetitive signal. In other words, a plurality of demodulated signal portions are obtained in parallel.

[0034] For example, a plurality of demodulated signal portions are obtained simultaneously. Since the plurality of demodulated signal portions are obtained in parallel by a parallel hardware architecture, a plurality of demodulated signal portions can be obtained simultaneously (irrespective of certain processing delays).

[0035] In an alternative embodiment, this portion of the signal is measured and demodulated in a successive manner such that a plurality of demodulated signal portions are obtained successively. Thus, the signal relates to a repetitive signal, such as a periodic test signal. This particular signal can be input multiple times in a successive manner, thereby ensuring that a single receiver can capture at least a portion of the signal multiple times in a successive manner.

[0036] Typically, the portion of the signal that is captured multiple times is the same portion. The same portion of the signal is captured in parallel due to a parallel hardware architecture or is captured successively due to repeated capture of the signal.

[0037] The present invention also provides performing modulation quality measurement using the signal verified by the above method. Since the signal has been verified as a reference signal, modulation quality measurement can be performed using the verified signal.

[0038] Furthermore, the present invention provides a receiver architecture system for receiving and processing an unknown signal. The receiver architecture system includes at least one input configured to receive the signal. In addition, the receiver architecture system has at least one demodulation module configured to demodulate a portion of the signal to obtain a demodulated signal portion having at least one symbol. In addition, the receiver architecture system has at least one evaluation module configured to evaluate the obtained symbol to obtain at least one evaluation result. Finally, the receiver architecture system includes at least one processing module configured to estimate an error rate of the signal based on the obtained at least one evaluation result and / or verify the signal as a reference signal based on the obtained at least one evaluation result.

[0039] The receiver architecture system is capable of performing the above method. Thus, referring to the above aspects and advantages. In fact, the receiver architecture system is capable of obtaining a plurality of demodulated signal portions, each demodulated signal portion having at least one symbol, for example by repeatedly processing the captured signal.

[0040] One aspect provides that the signal receiver architecture includes a parallel hardware architecture configured to demodulate at least a portion of the signal in parallel to evaluate the obtained at least one symbol and / or estimate an error rate of the signal or rather verify the signal as a reference signal. Thus, the unknown signal can be processed in parallel by a plurality of receiving paths to perform the corresponding steps above in parallel. Thus, the signal is demodulated in parallel multiple times to obtain a plurality of demodulated signal portions.

[0041] Another aspect provides that the parallel hardware architecture includes a separator, with at least one input connected to the separator. Thus, the unknown signal is divided into a plurality of signals processed in parallel by a plurality of receiving paths to perform the corresponding steps above.

[0042] In general, possible symbol decision errors can be detected by the above methods and receiver architecture systems, especially in addition to the estimation of the bit error rate (BER) or symbol error rate (SER). BRIEF DESCRIPTION OF THE DRAWINGS

[0043] When taken in conjunction with the accompanying drawings, other aspects and advantages of the claimed subject matter will become more readily appreciated. In the drawings,

[0044] - Figure 1 a receiver architecture system according to a first embodiment of the present invention is schematically shown,

[0045] - Figure 2 a second embodiment of the receiver architecture system according to the present invention is schematically shown, and

[0046] - Figure 3 a flowchart showing a method of estimating an error rate according to the present invention is schematically shown. DETAILED DESCRIPTION

[0047] The following detailed description set forth in connection with the appended drawings, where like reference numerals refer to like elements, is intended as a description of various embodiments of the disclosed subject matter and is not intended to represent the only embodiments. Each embodiment described in this disclosure is provided by way of example or illustration only and should not be construed as superior or better than other embodiments. The illustrative examples provided herein are not intended to be exhaustive or to limit the claimed subject matter to the precise forms disclosed.

[0048] For purposes of this disclosure, the phrase "at least one of A, B, and C," for example, means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C), including all other possible permutations when listing more than three elements. In other words, the term "at least one of A and B" generally means "A and / or B," i.e., A alone, B alone, or A and B.

[0049] In Figure 1 a receiver architecture system 10 for receiving and processing an unknown signal is shown.

[0050] The receiver architecture system 10 has at least one input 12 connected to a splitter 14. Thus, the receiver architecture system 10 receives the unknown signal via its input 12, which is forwarded to the splitter 14 to be split into a plurality of signals.

[0051] The splitter 14 is also connected to a plurality of receiving paths 16 such that the entire receiver architecture system 10 is a parallel hardware architecture since a plurality of parallel receiving paths 16 are provided.

[0052] In each receiving path 16, a demodulation module 18 is provided, which is configured to demodulate at least a part of the processed signal. Since a plurality of receiving paths 16 are provided, and each receiving path includes a corresponding demodulation module 18, the entire receiver architecture system 10 is capable of obtaining a plurality of demodulated signal parts, each demodulated signal part having at least one symbol. In fact, when demodulating the corresponding signals in a plurality of parallel receiving paths 16, a symbol sequence is obtained.

[0053] The receiver architecture system 10 further includes at least one evaluation module 20, in particular each receiving path 16 includes an evaluation module 20 for evaluating at least one symbol obtained after demodulation. The at least one evaluation module 20 is configured to evaluate the obtained symbols so as to obtain at least one evaluation result. As Figure 1 shown by the dashed line in, the at least one evaluation module 20 can jointly process all the symbols of different demodulated signal parts, which will be described in more detail later.

[0054] Finally, the receiver architecture system 10 includes at least one processing module 22 connected to the evaluation module 20. The processing module 22 and the evaluation module 20 can be built on the same chip.

[0055] The at least one processing module 22 is configured to estimate the error rate of the corresponding signal processed in each receiving path 16 based on at least one evaluation result obtained from the at least one evaluation module 20, and / or to verify the corresponding signal processed in each receiving path 16 as a reference signal based on at least one evaluation result obtained from the at least one evaluation module 20. In other words, the processing module 22 is configured to further process at least one evaluation result so as to obtain a corresponding processing result, that is, an error rate, or more precisely a verification result.

[0056] In addition, the processing module 22 can also be enabled to determine the overall error rate of the signal or verify the signal as a reference signal. For this purpose, the respective results can be combined or summed. In fact, the data on which the corresponding results are derived are summed to obtain the overall result of the signal received via the input 12.

[0057] Generally, the error rate can be a bit error rate (BER) or a symbol error rate (SER).

[0058] In Figure 2 is shown a receiver architecture system 10 according to another embodiment, wherein the receiver architecture system 10 does not include a separator and a plurality of receiving paths.

[0059] In contrast to Figure 1Different from the first embodiment shown, the second embodiment includes only a single receiver, which has a demodulation module 18, an evaluation module 22, and a processing module 22. Thus, the signal received via input 12 is captured multiple times in a successive manner in order to successively obtain multiple demodulated signal portions. In this case, the signal is a repetitive signal such that the same portion of the signal is captured successively, such that the multiple demodulated signal portions are related to the same portion of the signal.

[0060] Thus, Figure 1 and Figure 2 both receiver architecture systems 10 shown are capable of obtaining multiple demodulated signal portions of the same portion of the signal received via input 12 of the receiver architecture system 10.

[0061] In Figure 3 more detail is described the method performed by the receiver architecture system 10 (as shown in Figure 1 or Figure 2 ).

[0062] As Figure 3 shown, the signal is captured multiple times (N times), i.e., captured in parallel or successively. In any case, multiple demodulated signal portions are obtained, each demodulated signal portion having at least one symbol, in particular a symbol sequence. The respective symbol sequences of the multiple demodulated signal portions are represented by symbol 1, symbol 2... symbol N in Figure 3 .

[0063] Then, each symbol, i.e., symbol sequence, of the multiple demodulated signal portions is evaluated by at least one evaluation module 20 in order to obtain at least one evaluation result. In fact, an evaluation result can be obtained separately for each of the multiple demodulated signal portions.

[0064] During the evaluation step, the symbols of the demodulated signal portions can be compared with each other at defined time instances. In other words, a time reference is used to separately define the first symbol among the symbols of the demodulated signal portions such that the symbol sequences can be compared with each other.

[0065] In fact, the individual symbols in the symbol sequence are associated with dedicated symbol times. Thus, for each symbol time, i.e., the time position of the respective symbol relative to the symbol sequence, the respective symbols of the demodulated signal portions are compared with each other, i.e., the first symbol of the first symbol sequence ("symbol 1"), the first symbol of the second symbol sequence ("symbol 2")... the first symbol of the Nth symbol sequence ("symbol N"). This applies to all symbols of the symbol sequences, i.e., the respective second symbols, the respective third symbols, etc.

[0066] For each symbol time, i.e., at each defined time instance, a histogram can be created for each defined time instance in order to determine the correct symbol at the respective time instance, asFigure 3 As shown. In fact, for each defined time instance, i.e., each symbol time, the frequency of a certain symbol (value) in the demodulated signal portion is identified.

[0067] In the illustrated embodiment, symbols A, B, C, D, and E appear at the defined time instances, where symbol C appears most frequently. In other words, the frequency of symbol C is the highest. Thus, symbol C is estimated as the correct symbol for that time instance.

[0068] Based on the histogram, the correct symbol at each defined time instance (i.e., for each symbol time) can be estimated such that the deviation from the estimated correct symbol can be verified during the evaluation step. In the case of a deviation from the estimated correct symbol, an error is estimated.

[0069] In the illustrated exemplary histogram, symbols A, B, D, and E are estimated as errors.

[0070] Again, this estimation is performed for each symbol time, i.e., at all defined time instances, or more precisely for all symbols of the symbol sequence, such that the total number of errors for each demodulated signal portion can be determined.

[0071] Furthermore, at least one specific symbol can be selected from the symbol sequence, and the evaluation should be based on this specific symbol. This specific symbol can be a symbol considered to be correct.

[0072] Alternatively, this specific symbol can be considered incorrect, and adjacent symbols are also taken into account such that constellation points can be considered for evaluation purposes.

[0073] Another alternative for evaluation involves comparing only the corresponding symbols of the demodulated signal portions at each defined time instance (i.e., at each symbol time). In other words, a subset of multiple demodulated signal portions (e.g., five to ten demodulated signal portions) can be considered in order to determine the possibly estimated correct symbol for the defined time instance. Then, the symbols of the other demodulated signal portions can be compared with the possibly estimated correct symbol.

[0074] In any case, the evaluation result for each demodulated signal portion is obtained. The corresponding evaluation result can include the number of errors for each demodulated signal portion, i.e., the absolute number of errors. As described above, an error occurs when the symbol at the defined time instance is different from the estimated symbol for that specific time instance.

[0075] Then, at least one evaluation result obtained by the processing module 22 is further processed (for each demodulated signal portion) such that the error rate of the signal is estimated, in particular for the correspondingly processed signal. In fact, the bit error rate (BER) is estimated individually for each of the plurality of demodulated signal portions, so that N bit error rates are estimated. Alternatively, the symbol error rate (SER) is estimated.

[0076] As Figure 3 shown, the data associated with the estimated plurality of error rates is further processed by the processing module 22, wherein the symbols assigned to the error rates, i.e., the determined errors and the total number of processed symbols, are summed to obtain the error rate of the signal received through the input 12. The corresponding data obtained can also be displayed in order to inform the user of the receiver architecture system 10 accordingly (e.g., by means of a histogram).

[0077] As an alternative to estimating the error rate, the processing module 22 can also verify whether the signal is a reference signal. In the case where the signal is verified as a reference signal, since no error rate is determined, the verified signal can be used to subsequently perform modulation quality measurements.

[0078] Then, the verified signal can be used to perform modulation quality measurements, for example, for testing the device under test.

[0079] Certain embodiments disclosed herein, in particular corresponding one or more modules and / or one or more units, utilize circuitry (e.g., one or more circuits) to implement the standards, protocols, methods, or techniques disclosed herein, operably coupling two or more components, generating information, processing information, analyzing information, generating signals, encoding / decoding signals, converting signals, transmitting and / or receiving signals, controlling other devices, etc. Any type of circuitry can be used.

[0080] In one embodiment, among other things, the circuitry includes one or more computing devices such as a processor (e.g., a microprocessor), a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a system on a chip (SoC), etc., or any combination thereof, and can include discrete digital or analog circuit elements or electronic devices or a combination thereof. In one embodiment, the circuitry includes a hardware circuit implementation (e.g., an implementation in an analog circuit, an implementation in a digital circuit, etc., and combinations thereof).

[0081] In one embodiment, the circuitry system includes a combination of circuitry and a computer program product having software or firmware instructions stored on one or more computer-readable memories, and the circuitry and the computer program product work together to cause the device to execute one or more of the protocols, methods, or techniques described herein. In one embodiment, the circuitry system includes circuitry that requires software, firmware, etc. to operate, such as a microprocessor or a portion of a microprocessor. In one embodiment, the circuitry system includes one or more processors or portions thereof and accompanying software, firmware, hardware, etc.

[0082] This application may refer to quantities and numbers. Unless otherwise specified, these quantities and numbers are not considered restrictive, but rather examples of possible quantities or numbers associated with this application. Also in this regard, this application may use the term "plurality" to refer to a quantity or number. In this regard, the term "plurality" refers to any number greater than one, e.g., two, three, four, five, etc. The terms "about," "approximately," "close to," etc. refer to plus or minus 5% of the stated value.

Claims

1. A method for estimating the error rate of an unknown signal, comprising: Measuring and demodulating a part of the signal multiple times to obtain multiple demodulated signal parts, each demodulated signal part having at least one symbol, Evaluating the symbols of the multiple demodulated signal parts to obtain at least one evaluation result, and Estimating the error rate based on the at least one evaluation result.

2. The method according to claim 1, wherein, Estimating the error rate for each of the multiple demodulated signal parts separately, such that multiple error rates are obtained.

3. The method according to claim 1 or 2, wherein The error rate is a bit error rate or a symbol error rate.

4. A method for verifying an unknown signal, comprising: Measuring and demodulating a part of the signal multiple times to obtain multiple demodulated signal parts having symbols, Evaluating the symbols of the multiple demodulated signal parts to obtain at least one evaluation result, and Verifying the signal as a reference signal based on the at least one obtained evaluation result.

5. The method according to claim 1 or 4, wherein Each demodulated signal part includes multiple symbols.

6. The method according to claim 5, wherein Using a time reference to separately define a first symbol among the symbols of the demodulated signal part.

7. The method according to claim 5 or 6, wherein The symbols of the demodulated signal part are compared with each other at defined time instances.

8. The method according to claim 7, wherein Creating a histogram for each defined time instance to determine the correct symbol at the corresponding time instance.

9. The method according to claim 8, wherein, Creating multiple histograms for each defined time instance.

10. The method according to claim 8 or 9, wherein, The histogram is evaluated to obtain the at least one evaluation result.

11. The method according to claim 1 or 4, wherein, Evaluating the symbols of the multiple demodulated signal parts by selecting at least one specific symbol, and the at least one evaluation result is obtained based on the at least one specific symbol.

12. The method according to claim 11, wherein, The at least one specific symbol is a symbol considered to be incorrect.

13. The method according to claim 11 or 12, wherein, The adjacent symbols of the at least one specific symbol are also considered for obtaining the at least one evaluation result.

14. The method according to claim 1 or 4, wherein The part of the signal is measured and demodulated in parallel by a parallel hardware architecture.

15. The method according to claim 1 or 4, wherein The multiple demodulated signal parts are obtained simultaneously.

16. The method according to claim 1 or 4, wherein Measuring and demodulating the part of the signal in a successive manner such that the multiple demodulated signal parts are obtained successively.

17. Performing modulation quality measurement using the signal verified by the method according to claim 4 or 5.

18. A receiver architecture system for receiving and processing unknown signals, wherein, The receiver architecture system includes: At least one input configured to receive the signal, At least one demodulation module configured to demodulate a part of the signal to obtain a demodulated signal part having at least one symbol, At least one evaluation module configured to evaluate the at least one obtained symbol to obtain at least one evaluation result, and At least one processing module configured to estimate the error rate of the signal based on the at least one obtained evaluation result and / or verify the signal as a reference signal based on the at least one obtained evaluation result.

19. The receiver architecture system according to claim 18, wherein, The signal receiver architecture includes a parallel hardware architecture configured to demodulate at least one part of the signal in parallel, evaluate the at least one obtained symbol, and / or estimate the error rate of the signal or rather verify the signal as the reference signal.

20. The receiver architecture system according to claim 19, wherein, The parallel hardware architecture includes a separator, and the at least one input is connected to the separator.

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