KR20110029059A - The apparatus for frequency selective transmission - Google Patents

Abstract

PURPOSE: An apparatus for frequency selective transmission is provided to reduce the complexity of an analog transmission/reception terminal necessary for the transmission of a pass band. CONSTITUTION: A header generating unit(60) generates a header including the attribute information for transmission data, and a data generating unit(70) transmits digital data through a desirable frequency band. A pilot generating unit(80) generates a pilot which is inserted into a frame for frequency offset compensation. A multiplexer(90) receives the outputs of a preamble generating unit, an SFD/RI generating unit, the header generating unit, the data generating unit and the pilot generating unit, and multiplexes the outputs. A signal electrode(110) transmits the outputs of the multiplexer into a human body.

Description

Frequency Selective Transmitter {THE APPARATUS FOR FREQUENCY SELECTIVE TRANSMISSION}

The present invention relates to a frequency selective transmission apparatus, and more particularly, to avoid a frequency band in which noise power around a human body is concentrated compared to other bands, and the human body acts as a waveguide so that the intensity of a transmitted signal is radiated to the outside of the human body. By suggesting various embodiments of a frequency selective transmission apparatus using a frequency selective spreading code to use a limited frequency band up to a frequency band larger than the signal strength, a predetermined processing gain can be obtained according to various transmission data rates and various applications. The present invention relates to a technique for reducing power consumption by reducing the complexity of the analog transmitter / receiver required during passband transmission.

The present invention is derived from a study conducted as part of the IT source technology development project of the Ministry of Knowledge Economy [Task Management Number: 2006-S-072-04, Task name: Human Communication Controller SoC].

Patent No. 829865, filed in 2006, filed by the present inventors, and registered in 2008, uses a restricted passband from 5 MHz band to 40 MHz band to implement a human body communication system. The present invention discloses a human body communication system and method for performing scrambling, channel coding, interleaving, spreading, etc. using unique user identification information (ID).

In addition, US Patent No. 912543, entitled "Modulation and Demodulation Method Using Frequency-Selective Basebands," filed in 2007 and registered in 2009, employs serial-to-parallel conversion, frequency-selective baseband transmission, and a limited number of spreading codes. A frequency selective multiplexing scheme is disclosed that can improve the processing gain of a circuit and increase the transmission data rate.

However, a configuration of a transmission device for transmitting data having various transmission data rates according to a predetermined frame configuration and a configuration of a transmission device for providing a suitable quality according to various applications have not been disclosed.

Accordingly, the present invention is to solve the problems of the prior art as described above, and is implemented in various embodiments to obtain a predetermined processing gain according to various transmission data rates and various applications, while providing an analog transmitter / receiver required for passband transmission. It is to provide a frequency selective transmission apparatus capable of reducing power consumption by reducing complexity.

A frequency selective transmission apparatus according to an embodiment of the present invention for achieving the above object, the preamble generating unit for generating a preamble for the synchronization of the frame; Creates a Start Frame Delimiter / Rate Indicator (SFD / RI) with the capability of an indicator to indicate the beginning of a frame and to specify the rate of header fields or header and data fields. SFD / RI generator; A header generator for generating a header including attribute information of the transmission data; A data generator for transmitting digital data in a desired frequency band with a preset processing gain; A pilot generator for generating a pilot inserted into the frame for frequency offset compensation; A multiplexer configured to multiplex the outputs of the preamble generator, the SFD / RI generator, the header generator, the data generator, and the pilot generator; And a signal electrode for transmitting the output of the multiplexer into the human body.

In addition, the frequency selective transmission apparatus according to another embodiment of the present invention for achieving the above object, a preamble generating unit for generating a preamble for the synchronization of the frame; Create a Start Frame Delimiter / Rate Indicator (SFD / RI) with an indicator to indicate the beginning of a frame and the ability to specify the rate of header / data fields. SFD / RI generator; A header / data generation unit for spreading the header and data including attribute information on the transmission data in the same manner to transmit the header and the data in a desired frequency band with a predetermined processing gain; A pilot generator for generating a pilot inserted into the frame for frequency offset compensation; A first multiplexer configured to receive and multiplex outputs of the preamble generator, the SFD / RI generator, the header / data generator, and the pilot generator; And a signal electrode for transmitting the output of the first multiplexer into the human body.

According to the present invention, in transmitting data having various transmission data rates according to a predetermined frame configuration, by selectively using an analog transmission processing unit according to various applications, only a digital signal or a band-limited amplified analog signal is predetermined in a desired frequency band. Processing gains can be achieved, high quality optimized for the application can be maintained, and the implementation is simple to reduce circuit complexity and power consumption.

1 is a frame diagram according to an embodiment of the present invention;
2 is a diagram illustrating a subgroup structure of a 64-bit Walsh code according to an embodiment of the present invention;
3 is a view showing a frequency band used according to the selection of the frequency selective spreading code according to an embodiment of the present invention;
4 is a configuration diagram of a frequency selective transmission apparatus according to a first embodiment of the present invention;
5 is a detailed configuration diagram of a data generating unit according to the first embodiment of the present invention;
6 is a configuration diagram of a frequency selective transmission apparatus according to a second embodiment of the present invention;
7 is a configuration diagram of a frequency selective transmission apparatus according to a third embodiment of the present invention;
8 is a detailed configuration diagram of a data generation unit according to a third embodiment of the present invention; and
9 is a configuration diagram of a frequency selective transmission apparatus according to a fourth embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, in describing the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' of an element means that the element may further include other elements, not to exclude other elements unless specifically stated otherwise.

The transmission device proposed by the present invention uses Frequency Selective Digital Transmission (FSDT). In the frequency selective digital transmission technique, data is spread in the frequency domain using a frequency selective spreading code and transmitted in digital form. In addition, the dominant frequency in which most transmission signals are distributed has a feature that can be selected by using a specific frequency selective spreading code.

1 is a frame diagram according to an embodiment of the present invention.

Referring to FIG. 1, a frame transmitted through a frequency selective transmission apparatus according to an embodiment of the present invention includes a preamble, a start frame delimiter / rate indicator (SFD / RI), a header, and a data field. The field has a configuration in which a pilot of a predetermined length is inserted into the transmitted data according to a time rule determined in the transmitted data, and a data cyclic redundancy check (CRC) is inserted at the end of the data field to determine the validity of the data field.

2 is a diagram illustrating a subgroup configuration of a 64-bit Walsh code according to an embodiment of the present invention.

Referring to FIG. 2, the 64 Walsh codes from W ₀ to W ₆₃ are divided into exactly 64 frequency bands so that the most predominant frequency fd of each Walsh code is sequentially mapped to the divided frequencies.

The 64 Walsh codes can be divided into one or more subgroups. For example, in the case of selecting 32 Walsh codes among 64 Walsh codes and using them as frequency selective spreading codes, 64 Walsh codes are divided into two subgroups, A0 and A1. Similarly, if you want to use 16 Walsh codes, divide them into 4 subgroups of B0 to B3, and if you want to use 8 Walsh codes, divide them into 8 subgroups of C0 to C7, and 4 Walsh codes If you want to select and use, divide into 16 subgroups of D0 to D15, and if you want to use two Walsh codes are divided into 32 subgroups of E0 to E31. By selecting and using any one of the divided subgroups, the user or designer can select a desired frequency band.

However, the total number of Walsh codes and the number of subgroups are not limited thereto, and a total of 2 ^N (N is real) Walsh codes are divided into 2 ^M (M is real, M <N) to generate a subgroup. One subgroup can be adopted and used.

3 is a diagram illustrating a frequency band used according to the selection of the frequency selective spreading code according to an embodiment of the present invention. In the following embodiment, 64 Walsh codes are used as frequency selective spreading codes as shown in FIG. 2 and a 64 MHz clock is assumed.

FIG. 3A illustrates a case where the A1 subgroup shown in FIG. 2 is selected, and the transmission data includes 32 Walsh codes (W32 to W63) having dominant frequency components in a frequency band of 16 MHz to 32 MHz, which is desired by a user or a designer. ) Is mapped to one Walsh code and 64 bits are output in the form of 1-bit string.

(B) of FIG. 3 illustrates a case where the B3 subgroup shown in FIG. 2 is selected, and the transmission data includes 16 Walsh codes (W48 to W63) having dominant frequency components in a frequency band of 24 MHz to 32 MHz, which is desired by a user or a designer. ) Is mapped to one Walsh code and 64 bits are output in the form of 1-bit string.

(C) of FIG. 3 illustrates a case where the C7 subgroup shown in FIG. 2 is selected, and the transmission data includes eight Walsh codes (W56 to W63) having dominant frequency components in a frequency band of 28 MHz to 32 MHz, which is desired by a user or a designer. ) Is mapped to one Walsh code and 64 bits are output in the form of 1-bit string.

3 (d) shows a case where the D15 subgroup shown in FIG. 2 is selected, and transmission data includes four Walsh codes (W60 to W63) having dominant frequency components in a frequency band of 30 MHz to 32 MHz, which is desired by a user or a designer. ) Is mapped to one Walsh code and 64 bits are output in the form of 1-bit string.

Hereinafter, a configuration of a frequency selective transmission apparatus according to various embodiments of the present disclosure will be described with reference to FIGS. 4 to 9. In the following embodiment, for convenience of description, a frame including a preamble, SFD / RI, header, and data is transmitted as shown in FIG. 1, and 64 Walsh codes as shown in FIG. 2 are frequency-selected spreading codes. As shown in FIG. 3, the upper 32, 16, 8, and 4 Walsh codes are selected from 64 Walsh codes, and a 64 MHz clock is used.

4 is a configuration diagram of a frequency selective transmission apparatus according to a first embodiment of the present invention.

The frequency selective transmission apparatus according to the first embodiment includes a microcontroller 10, a transmission register 20, a transmission buffer 30, a preamble generator 40, an SFD / RI generator 50, and a header generator ( 60), a data generator 70, a pilot generator 80, a multiplexer 90, an analog transmission processor 100, and a signal electrode 110.

The microcontroller 10 processes the transmission data and the data information received from the upper layer to transfer the data information to the transmission register 20 and the transmission data to the transmission buffer 30.

The transmit register 20 stores the data information received from the microcontroller 10, that is, the preamble configuration value, the SFD / RI control value, and the attribute information of the transmission data, respectively, and the preamble generator 40 and the SFD / RI generator 50. ) And the header generator 60.

The transmission buffer 30 stores transmission data received from the microcontroller 10 and inputs the transmission data to the data generation unit 70 at a predetermined time for each frame.

The preamble generator 40 is positioned at the beginning of each frame to generate a preamble for synchronizing the frames, and includes a preamble generator 41 and a spreader 42. The preamble generator 41 may generate a preamble composed of, for example, a pseudo noise code or a repetitive combination of pseudo noise codes. The diffuser 42 spreads the preamble generated by the preamble generator 41. This is to spread the preamble into a desired frequency band while maintaining the correlation characteristic which is a unique purpose of the preamble as much as possible, and to use any one of the Walsh codes shown in FIG. 2 or to improve one Walsh code and adjacent correlation characteristics. Line code, such as Manchester coding, can be used in combination.

The SFD / RI generator 50 generates an SFD / RI having a function of an indicator for notifying the start of a frame and a function of designating a transmission rate of a header field or a header and a data field, and the SFD / RI generator 51 ) And a diffuser 52. The SFD / RI generator 51 may use the same pseudonoise code or a different pseudonoise code as the preamble generator 41, and gives a time offset at the beginning of the pseudonoise code to follow the SFD / RI and the header field or header and The transmission rate of the data field can be determined. The spreader 52 is used to spread the SFD / RI generated by the SFD / RI generator 51 to a desired frequency band. For example, one of the Walsh codes shown in FIG. 2 may be used.

The header generating unit 60 is for generating a header including attribute information of transmission data, and includes a header generator 61 and a spreader 62. The header generator 61 generates an header having an input value and a predetermined control bit from the transmit register 20 and having a predetermined number of bits. In this case, when the SFD / RI generated by the SFD / RI generator 51 specifies only the data rate of the header, the header includes data rate information, but the SFD / RI generator 51 specifies both the header and the data rate. In this case, the header does not have to include transmission rate information of separate data. The spreader 62 is used to spread the header generated by the header generator 61 to a desired frequency band. For example, the spreader 62 may use any one of the Walsh codes shown in FIG. 2.

The data generator 70 transmits digital data in a frequency band desired by a user or a designer with a predetermined processing gain, and includes a serial-to-parallel converter (S2P) 71 and a frequency selective spreader 72. do. The S2P 71 performs serial-to-parallel conversion on N bits according to the data rate for the transmission data input from the transmission buffer 30. For example, N is 5 when 32 Walsh codes are selected from 64 Walsh codes as shown in FIG. 3A, and N is 4 when 16 Walsh codes are selected as shown in FIG. In the case of selecting eight Walsh codes as shown in (c) of FIG. 3, N is 3. In the case of selecting four Walsh codes as shown in (d) of FIG. 3, N is 2. The frequency selective spreader 72 spreads the transmission data serial-parallelized by the S2P 71 using a frequency selective spread code located within a desired frequency band. The detailed configuration of the frequency selective spreader 72 is shown in FIG. It will be described later with reference to. The output bit of the data generator 70 configured as described above can be directly transmitted digitally by 1 bit. Therefore, the output of the data generator 70 may be input directly to the signal electrode 110 without any separate analog transmission process such as a digital-analog converter, an intermediate frequency converter, or the like.

The pilot generator 80 is for generating a pilot inserted into a frame to be transmitted to compensate for frequency offset with the transmitter at the receiver, and includes a pilot generator 81 and a spreader 82. The pilot generator 81 may use some or all of the preamble generated by the preamble generator 41 as a pilot, and may generate a pilot having a length having a same configuration as the preamble but outputting different values using different initial values. It may be. The spreader 82 is used to spread the pilot generated by the pilot generator 81 to a desired frequency band, and may use any one of the Walsh codes shown in FIG. 2.

The multiplexer 90 receives and outputs the outputs of the preamble generator 40, the SFD / RI generator 50, the header generator 60, the data generator 70, and the pilot generator 80, respectively. A frame configured as shown in FIG. 1 is output as a 1-bit digital signal.

The analog transmission processing unit 100 may be selectively provided if necessary according to the application of the transmission apparatus, among the bandpass filter 101 for further limiting the desired frequency band and the amplifier 102 for amplifying the final output signal. It may be configured to include any one or more.

The signal electrode 110 is used to transmit the output of the multiplexer 90 or the analog transmission processor 100 into the human body, and may be implemented as a contact-based electrode or a non-contact-based electrode or an antenna structure.

5 is a detailed configuration diagram of a data generation unit according to the first embodiment of the present invention.

The data generation unit according to the first embodiment includes an S2P 71 and a frequency selective spreader 72, and the frequency selective spreader 72 is a 6-bit counter 74, Gray index, which is reset to an initial value every symbol period. 5 XOR logic circuits 75-1 to 75-5 for the purpose, C ₅ to C ₀ and input bits s0 and 5 XOR logic circuits 75-1 to 75-5 for the output of the 6-bit counter 74 To the XOR logic circuits 77 for XORing the outputs of the six AND logic circuits 76-1 to 76-6 and the six AND logic circuits 76-1 to 76-6, each having an output bit of? It has a 6-bit input bit (s0, b4 = s1, b3 = s2, b2 = s3, b1 = s4, b0).

Referring to the operation of the data generation unit in detail, for example, when the A1 subgroup illustrated in FIG. 2 is selected as shown in FIG. 3A, the S2P 71 receives 5 Mbits of 1 bit data and 5 Mps parallel of 1Msps. Output the data p4 to p0. When the input bit s0 for controlling the frequency selection is set to '1' and p4 to p0, which are output 5 bits of the S2P 71, are sequentially input to b4 to b0, the frequency selective spreader 72 receives the input bit b4. According to the value of ~ b0), one Walsh code is generated among 32 Walsh codes (W32 to W63) and 64 bits are output in the form of 1 bit string at the speed of 64 Mcps.

When the B3 subgroup shown in FIG. 2 is selected as shown in FIG. 3B, the S2P 71 receives 1-bit data of 4 Mbps and outputs 4-bit parallel data p3 to p0 of 1Msps. When the input bits s0 and s1 for controlling the frequency selection are set to '1', respectively, and the output 4 bits p3 to p0 of the S2P 71 are sequentially input to b3 to b0, the frequency selective spreader 72 is input. According to the values of bits b3 to b0, one Walsh code is generated among the 16 Walsh codes W48 to W63, and 64 bits are output in the form of 1 bit string at a speed of 64 Mcps.

When the C7 subgroup shown in FIG. 2 is selected as shown in FIG. 3C, the S2P 71 receives 3 Mbps 1-bit data and outputs 1-Msps of 3-bit parallel data p2 to p0. When the input bits s0, s1, and s2 for controlling the frequency selection are set to '1', respectively, and p2 to p0, which are output 3 bits of the S2P 71, are sequentially input to b2 to b0, the frequency selective spreader 72 Generates one Walsh code out of eight Walsh codes W56 to W63 according to the values of the input bits b2 to b0 and outputs 64 bits at a speed of 64 Mcps in the form of 1 bit string.

When the D15 subgroup shown in FIG. 2 is selected as shown in FIG. 3D, the S2P 71 receives 1-bit data of 2Mbps and outputs 2-bit parallel data p1 and p0 of 1Msps. When the input bits s0, s1, s2, and s3 for controlling frequency selection are set to '1', respectively, and the output 2 bits p1 and p0 of the S2P 71 are sequentially input to b1 and b0, the frequency selective spreader ( 72 generates one Walsh code among four Walsh codes W60 to W63 according to the values of the input bits b1 and b0, and outputs 64 bits in the form of 1 bit string at a speed of 64 Mcps.

6 is a block diagram of a frequency selective transmission apparatus according to a second embodiment of the present invention.

The frequency selective transmission apparatus according to the second embodiment includes a microcontroller 10, a transmission register 20, a transmission buffer 30, a preamble generator 40, an SFD / RI generator 50, and a header / data generation. The unit 70 includes a pilot generation unit 80, first and second multiplexers 120 and 90, an analog transmission processing unit 100, and a signal electrode 110.

The frequency selective transmission apparatus according to the second embodiment does not spread using a single spreading code in generating a header, but rather spreads through an S2P and a frequency selective spreader as well as data. It is different from the transmitter.

Specifically, the frequency selective transmission apparatus according to the second embodiment further includes a first multiplexer 120, and the transmission register 20 is attribute information of transmission data among data information received from the microcontroller 10. Is input to the first multiplexer 120, and the transmission buffer 30 stores the transmission data received from the microcontroller 10 and transmits the transmission data to the first multiplexer 120 at a predetermined time every frame. The first multiplexer 120 multiplexes the attribute information of the received transmission data and the transmission data and inputs the same to the header / data generation unit 70. The header / data generating unit 70 spreads the header and data according to the frequency selective spreading method in the same manner as the data generating unit in the first embodiment. The remaining components are the same as those of the frequency selective transmission apparatus according to the first embodiment, and detailed description thereof will be omitted.

7 is a configuration diagram of a frequency selective transmission apparatus according to a third embodiment of the present invention.

The frequency selective transmission apparatus according to the third embodiment, like the frequency selective transmission apparatus according to the first embodiment, includes a microcontroller 10, a transmission register 20, a transmission buffer 30, a preamble generator 40, The SFD / RI generator 50, the header generator 60, the data generator 70, the pilot generator 80, the multiplexer 90, the analog transmitter 100, and the signal electrode 110 are included. It is configured by. However, the data generator 70 is different from the first embodiment in that the S2P 71, the first diffuser 72, and the second diffuser 73 are different. Only the detailed configuration of 70 will be described with reference to FIG. 8.

8 is a detailed configuration diagram of a data generation unit according to a third embodiment of the present invention.

The data generator 70 according to the third embodiment includes an S2P 71, a first diffuser 72, and a second diffuser 73. The S2P 71 receives 1-bit data input from the transmission buffer 30 and serial-to-parallel converts it to N bits according to the data rate and outputs it. The first spreader 72 receives and spreads the output N bits of the S2P 72, and uses a different spreading code according to the data rate. The second spreader 73 spreads the output of the first spreader 72 which differs according to the data rate with one spreading code.

Referring to the operation of the data generating unit in detail, for example, in FIG. 8A, the S2P 71 receives 5 Mbps 1-bit data and outputs 1 Msps of 5-bit parallel data p4 to p0. The first spreader 72 generates a 32-bit Walsh code, and selects one Walsh code from 32 32-bit Walsh codes W0 to W31 according to the values of the input bits b4 to b0 to form a 1-bit string. Output 32 bits at 32Mcps. The second diffuser 73 re-spreads the output 1 chip of the first diffuser 72 twice with W63, and consequently selects one Walsh code from the 32 Walsh codes W32 to W63, which are sub-groups of FIG. Output 64 bits as 64Mcps in the form of 1 bit string.

In the case of FIG. 8B, the S2P 71 receives 1-bit data of 4 Mbps and outputs 4-bit parallel data p3 to p0 of 1 Msps. The first spreader 72 generates a 16-bit Walsh code, and selects one Walsh code from 16 16-bit Walsh codes W0 to W15 according to the values of the input bits b3 to b0 to form a 1-bit string. Output 16 bits at 16Mcps. The second diffuser 73 re-spreads the output 1 chip of the first diffuser 72 four times to W63, and consequently selects one Walsh code from the 16 Walsh codes W48 to W63 in the B3 subgroup of FIG. Output 64 bits as 64Mcps in the form of 1 bit string.

In the case of FIG. 8C, the S2P 71 receives 1-bit data of 3Mbps and outputs 3-bit parallel data p2 to p0 of 1Msps. The first spreader 72 generates an 8-bit Walsh code, and selects one Walsh code from the eight 8-bit Walsh codes W0 to W7 according to the values of the input bits b2 to b0 to form a 1-bit string. Output 8 bits at 8Mcps. The second diffuser 73 re-spreads the output 1 chip of the first diffuser 72 8 times to W63, and consequently selects one Walsh code from the eight Walsh codes W56 to W63, which are the C7 subgroups of FIG. Output 64 bits as 64Mcps in the form of 1 bit string.

In the case of FIG. 8D, the S2P 71 receives 1-bit data of 2Mbps and outputs 2-bit parallel data p1 and p0 of 1Msps. The first spreader 72 generates a 4-bit Walsh code, and selects one Walsh code among four 4-bit Walsh codes W0 to W3 according to the values of the input bits b1 and b0 to form a 1-bit string. Output 4 bits at 4Mcps. The second diffuser 73 re-spreads the output 1 chip of the first diffuser 72 16 times to W63, and consequently selects one Walsh code from the four Walsh codes W60 to W63 in the D15 subgroup of FIG. Output 64 bits as 64Mcps in the form of 1 bit string.

9 is a configuration diagram of a frequency selective transmission apparatus according to a fourth embodiment of the present invention.

The frequency selective transmission apparatus according to the fourth embodiment includes a microcontroller 10, a transmission register 20, a transmission buffer 30, a preamble generator 40, an SFD / RI generator 50, and a header / data generation. A unit 70, a pilot generator 80, first and second multiplexers 120 and 90, a diffuser 130, an analog transmission processor 100, and a signal electrode 110 are included.

The frequency selective transmission apparatus according to the fourth embodiment includes a first multiplexer 120 to spread the header and the data using the same spreading scheme as in the second embodiment, and the frequency selective according to the third embodiment. In the transmitter, one diffuser connected to an output terminal of the second multiplexer 90 is a diffuser (a second diffuser in the data generator) included in the preamble generator, the SFD / RI generator, the data generator, and the pilot generator. There is a difference from the frequency selective transmission apparatus according to the above-described embodiments in that it is replaced with 130).

The diffuser 130 connected to the output terminal of the second multiplexer 90 spreads the output of the second multiplexer 90 using one diffusion code, for example, W63.

The present invention is not limited by the above-described embodiment and the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be substituted, modified, and changed in accordance with the present invention without departing from the spirit of the present invention.

10: microcontroller 20: transmit register
30: transmission buffer 40: preamble generation unit
50: SFD / RI generation unit 60: header generation unit
70: data generator 80: pilot generator
90: multiplexer 100: analog transmission processor
110: signal electrode 120: multiplexer
130: diffuser

Claims (18)

A preamble generating unit generating a preamble for synchronizing frames;
Creates a Start Frame Delimiter / Rate Indicator (SFD / RI) with the capability of an indicator to indicate the beginning of a frame and to specify the rate of header fields or header and data fields. SFD / RI generator;
A header generator for generating a header including attribute information of the transmission data;
A data generator for transmitting digital data in a desired frequency band with a preset processing gain;
A pilot generator for generating a pilot inserted into the frame for frequency offset compensation;
A multiplexer configured to multiplex the outputs of the preamble generator, the SFD / RI generator, the header generator, the data generator, and the pilot generator; And
And a signal electrode for transmitting the output of the multiplexer into the human body.
The method of claim 1,
A transmission register for inputting a preamble configuration value, an SFD / RI control value, and attribute information of the transmission data among data information transmitted to an upper layer to the preamble generator, the SFD / RI generator, and the header generator; And
And a transmission buffer for storing the transmission data received from an upper layer and inputting the transmission data to the data generation unit at a predetermined time for each frame.
The method of claim 1,
And an analog transmission processor connected to an output terminal of the multiplexer, the analog transmission processor including at least one of a bandpass filter for limiting the output of the multiplexer to a desired frequency band and an amplifier for amplifying a final output signal. Frequency selective transmitter.
The method of claim 1,
The preamble generator,
A preamble generator for generating a preamble composed of a pseudo noise code or a repetitive combination of pseudo noise codes; And
And a spreader for spreading the preamble generated by the preamble generator.
The method of claim 1,
The SFD / RI generation unit,
An SFD / RI generator using the same or different pseudo noise code as the preamble generator and generating an SFD / RI for specifying a transmission rate of the header field or the header and data fields by giving a time offset to the start of the pseudo noise code; And
And a diffuser for diffusing the SFD / RI generated by the SFD / RI generator.
The method of claim 2,
The header generation unit,
A header generator for generating a header including attribute information of the transmission data received from the transmission register and a preset control bit; And
And a spreader for spreading the header generated by the header generator.
The method of claim 2,
The data generator,
A serial-to-parallel converter for performing serial-to-parallel conversion on the transmission data received from the transmission buffer with N bits according to a data rate; And
And a frequency selective spreader for spreading the transmission data serial-parallelized by the series-parallel converter using a frequency selective spreading code located within a desired frequency band.
The method of claim 2,
The data generator,
A serial-to-parallel converter for performing serial-to-parallel conversion on the transmission data received from the transmission buffer with N bits according to a data rate;
A first spreader for spreading the output of the serial-to-parallel converter using a different spreading code according to a data rate; And
And a second spreader configured to spread the output of the first spreader using one preset spreading code.
The method of claim 1,
The pilot generation unit,
A pilot generator using part or all of the preamble generated by the preamble generator as a pilot, or generating a pilot having the same configuration and different output as the preamble; And
And a spreader for spreading the pilot generated by the pilot generator.
The method of claim 1,
And a spreader connected to an output terminal of the multiplexer, the spreader spreading the output of the multiplexer using one preset spreading code.
A preamble generating unit generating a preamble for synchronizing frames;
Create a Start Frame Delimiter / Rate Indicator (SFD / RI) with an indicator to indicate the beginning of a frame and the ability to specify the rate of header / data fields. SFD / RI generator;
A header / data generation unit for spreading the header and data including attribute information on the transmission data in the same manner to transmit the header and the data in a desired frequency band with a predetermined processing gain;
A pilot generator for generating a pilot inserted into the frame for frequency offset compensation;
A first multiplexer configured to receive and multiplex outputs of the preamble generator, the SFD / RI generator, the header / data generator, and the pilot generator; And
And a signal electrode for transmitting the output of the first multiplexer into the human body.
The method of claim 11,
A transmission register for inputting a preamble configuration value, an SFD / RI control value, and attribute information of the transmission data among data information transmitted to an upper layer to the preamble generator, the SFD / RI generator, and a second multiplexer, respectively;
A transmission buffer which stores the transmission data received from an upper layer and inputs the transmission data to the second multiplexer at a predetermined time every frame; And
And a second multiplexer which multiplexes the received attribute information of the transmitted data and the transmitted data and inputs the same to the header / data generating unit.
The method of claim 11,
An analog transmission processor connected to an output terminal of the first multiplexer and including at least one of a bandpass filter for limiting an output of the first multiplexer to a desired frequency band and an amplifier for amplifying a final output signal. Frequency selective transmission device, characterized in that it further comprises.
The method of claim 11,
The preamble generator,
A preamble generator for generating a preamble composed of a pseudo noise code or a repetitive combination of pseudo noise codes; And
And a spreader for spreading the preamble generated by the preamble generator.
The method of claim 11,
The SFD / RI generation unit,
An SFD / RI generator that uses the same or different pseudo noise code as the preamble generator and generates an SFD / RI for designating a transmission rate of the header / data field by giving a time offset to the start of the pseudo noise code; And
And a diffuser for diffusing the SFD / RI generated by the SFD / RI generator.
The method of claim 12,
The header / data generator,
A serial-to-parallel converter which receives the output of the second multiplexer and performs serial-to-parallel conversion to N bits according to a data rate; And
And a frequency selective spreader for spreading the header / data serially-parallelized by the serial-to-parallel converter using a frequency-selective spreading code located within a desired frequency band.
The method of claim 11,
The pilot generation unit,
A pilot generator using part or all of the preamble generated by the preamble generator as a pilot, or generating a pilot having the same configuration and different output as the preamble; And
And a spreader for spreading the pilot generated by the pilot generator.
The method of claim 11,
And a spreader connected to an output terminal of the first multiplexer, the spreader configured to spread the output of the first multiplexer using a predetermined spreading code.

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