TH85690A - Equalizer for AM bands on radio channels - Google Patents

Abstract

The DC60 method for adjusting OFDM symbol vectors received from the AM band on a radio channel that includes both main carrier and subcarrier modulation. The method consists of the following steps: calculating the BPSK signal; filtering the BPSK signal; filtering the complex sample signal received from the main carrier; using the BPSK signal and the filtered complex sample signal received from the main carrier to calculate various fading equalization coefficients; and multiplying the OFDM symbol vector by the fading equalization coefficients. The receiver contains an equalizer that performs this function. And multiply the OFDM symbol vector by the fading equalization coefficient, where the receiver contains an equalizer that performs this function.

Claims (25)

Updated 18/04/2017 1. Methods for balancing the OFDM symbol vector obtained from the AM band on a radio channel. The method consists of the following steps: Using a processing circuit to process the AM band on the radio channel, where the processing circuit arranges a number of row symbols into a row symbol vector; filtering the center frequency of the row symbol vector to create a center estimate of the row symbol vector; smoothing the center estimate of the row symbol vector over time and frequency; using the smoothed center estimate to calculate a number of equalization coefficients; and multiplying the OFDM symbol vector by the equalization coefficients, where the equalization coefficients are smoothed using quadratic functions and different quadratic functions applied for each subcarrier position. 2. Method of Claim 1, where quadratic functions are optimized at the center and the two end points of the subcarrier segment. 3. Method of Claim 1 further includes a step of completing the tertiary partition in the AM band on the radio channel before equalization. 4. Method of Claim 1, where the center estimate of the row symbol vector is adjusted. Smoothing is achieved using quadratic equation 5. The method of claim 4, where the quadratic equation smooths the approximation within the barrier shape. 6. The method of claim 1 is further elaborated with a step of completing the secondary barrier adjustment in the AM band on the radio channel before equalization. 7. A receiver is used to receive the OFDM symbol vector from the AM band on the radio channel. The receiver consists of an input for receiving the AM band on the radio channel, an equalizer for arranging a number of row symbols in the row symbol vector, a filter for the center frequency of the row symbol vector to create a center estimate of the row symbol vector, a smoother for the center estimate of the row symbol vector over time and frequency, a use of the smoothed center to calculate a number of equalization coefficients, and a multiplication of the OFDM symbol vector by the equalization coefficients, where the equalization coefficients are smoothed using... The following are examples of receivers: 8. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel; 9. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel, with an input for receiving the AM band on a radio channel. 10. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel, with an input for receiving the AM band on a radio channel. 2. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 3. An input for receiving the AM band on a radio channel. 4. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 5. An input for receiving the AM band on a radio channel. 6. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 7. An input for receiving the AM band on a radio channel. 8. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 8. An input for receiving the AM band on a radio channel. 9. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 10. An input for receiving the AM band on a radio channel. 11. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 12. An input for receiving the AM band on a radio channel. 13. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 14. An input for receiving the AM band on a radio channel. 14. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 14. An input for receiving the AM band on a radio channel. 15. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 15. An input for receiving the AM band on a radio channel. 15. A receiver for receiving OFDM symbol vectors from the AM band on a radio channel. 16. An input for receiving the AM band on a radio channel. An equalizer for arranging a number of row symbols in a row symbol vector; for filtering the center frequency of the row symbol vector to create a center estimate of the row symbol vector; for smoothing the center estimate of the row symbol vector over time and frequency; for using the smoothed center value to calculate a number of equalization coefficients and for multiplying the OFDM symbol vector by an equalization coefficient; for perfecting the combined secondary barrier in the AM band on the radio channel before equalization; and for processing the secondary barrier independently and both according to the combination; and an output device for generating an output signal that responds to the AM band on the radio channel. 13. A receiver for receiving the OFDM symbol vector from the AM band on the radio channel. The receiver includes an input for receiving the AM band on the radio channel. An equalizer is used to arrange a number of row symbols in a row symbol vector; to filter the center frequency of the row symbol vector to create a center estimate of the row symbol vector; to smooth the center estimate of the row symbol vector over time and frequency; to use the smoothed center value to calculate a number of equalization coefficients; and to multiply the OFDM symbol vector by the equalization coefficients; to perfect the combined secondary partition in the AM band on a radio channel before equalization; and to calculate submatrices independently and abundantly for all softcode bits in the secondary partition; to add the corresponding submatrices to create the first set of combined submatrices; to perfect the combined secondary partition to create a second set of combined submatrices for the same set of secondary softcode bits; and for each secondary softcode bit, to select the higher combined submatrice in the first and second sets. Two of the submatrices are outputs for the corresponding secondary softcode bits and output devices for generating output signals that respond to the AM band on radio channel 14. The method of balancing the OFDM symbol vector obtained from the AM band on radio channel consists of the following steps: using a processing circuit to process the AM band on radio channel, where the processing circuit arranges a number of line symbols in the line symbol vector; filtering the center frequency of the line symbol vector to create a center estimate of the line symbol vector; smoothing the center estimate of the line symbol vector over time and frequency; using the smoothed center to calculate a number of balancing coefficients; and multiplying the OFDM symbol vector by the balancing coefficients; adjusting the combined secondary barrier in the AM band on radio channel before balancing; and processing the secondary barriers independently and according to both combinations. 15. The method of claim 14 is further comprised of... The calculation of submatrices independently and extensively for all softcode bits in the secondary partition; adding the corresponding submatrices to create the first set of combined submatrices; perfectly balancing the combined secondary partition to create a second set of combined submatrices for the same set of secondary softcode bits; and for each secondary softcode bit, selecting the higher combined submatrice in the first and second sets of submatrices as the output for the corresponding secondary softcode bits. ------------------------------------------------------ 1. Method of balancing OFDM symbol vectors obtained from the AM band on a radio channel. The method consists of the following steps: using a processing circuit to process the AM band on a radio channel, where the processing circuit arranges a number of row symbols in the row symbol vector; filtering the center frequency of the row symbol vector to create a center estimate of the row symbol vector; smoothing the center estimate of the row symbol vector over time and frequency; using the smoothed center to calculate a number of balancing coefficients. And the OFDM symbol vector is multiplied by the equalization coefficient, where the equalization efficiency is smoothed using a quadratic function, and different quadratic functions are used for each subcarrier position. 2. According to claim 1, the BPSK filtering procedure consists of the following steps: transmitting the BPSK signal through a midband filter and a limiting response filter. 3. This method for OFDM symbol vectors is adjusted from the AM band on a radio channel that includes both the main carrier and subcarrier modulation waves. The method consists of the following steps: provide a row-sampling signal in the row-symbol vector; filter the center frequency of the row-symbol vector to obtain a measured median of the row-symbol vector; smooth the center frequency obtained from the row-symbol vector approximation with respect to time and frequency; use the smoothed center frequency obtained from the row-symbol vector approximation with respect to time and frequency; use the smoothed frequency to calculate a certain equalization coefficient; and multiply the OFDM symbol vector by the fading equalization coefficient. 4. In accordance with claim 3, the equalization coefficient is adjusted using a quadratic function. 5. According to claim 4, the quadratic function fits the midpoints and the two ends of the segment of the subcarrier wave. 6. In accordance with claim 4, different quadratic functions are used for each position of the subcarrier wave. 7. The procedure under claim 3 also includes the following steps: adding a tertiary buffer to the AM band on the radio channel before modulation. 8. The procedure under claim 3 also includes the following steps: adding a secondary buffer to the AM band on the radio channel before modulation. 9. Under the method described in claim 3, the center-band frequency is obtained by adjusting the row-type vector using a quadratic equation. 10. In accordance with claim 9, the quadratic equation is adjusted to the proportions of the divided shape. 11. In accordance with claim 9, the differential curve of the quadratic equation is used for the positions of the subcarrier waves. 12. The procedure under claim 3 also includes the following steps: adding a tertiary buffer to the AM band on the radio channel before modulation. 13. The procedure under claim 3 also includes the following steps: adding a secondary buffer to the AM band on the radio channel before modulation. 14. The method for calculating the variance of symbol data received from the AM band on a radio channel consists of the following steps: Arrange the continuous symbols into symbol vectors; calculate the logarithmic variance of the entire symbol vector; spread the logarithmic variance of the symbol vector over time and frequency; and use the spreadable logarithm to calculate the channel state. 15. The method under claim 14 also includes the following steps: using the channel state values to construct a submatrix for decoding the front-end error detection. 16. In accordance with claim 14, the logarithm of the variance of a symbolic vector is smoothed using a quadratic equation. 17. The method under claim 16 uses a quadratic equation to distribute the values within the divisions. 18. In accordance with claim 16, different quadratic curves are used to determine the positions of the subcarriers. 19. The procedure under claim 14 also includes the following steps: adding a tertiary buffer to the AM band on the radio channel before modulation. 20. The procedure under claim 14 also includes the following steps: adding a secondary buffer to the AM band on the radio channel before modulation. 21. The method for balancing the OFDM symbol vector received from the AM band on a radio channel consists of the following steps: Add the secondary and/or tertiary barrier to the AM band on the radio channel before balancing; calculate the fading coefficient, and multiply the OFDM symbol vector by the fading coefficient to obtain the OFDM symbol vector; and calculate the fading coefficient, and multiply the flattened OFDM symbol vector by the channel division coefficient to obtain the OFDM symbol vector output. 22. The receiver is designed to receive AM band frequencies from radio channels, including the first and second BPSK carrier and subcarrier waves. The receiver comprises: an input for receiving AM band frequencies on the radio channel; an equalizer for calculating the BPSK signal, for filtering the BPSK signal, for filtering the complex sample signal received from the main carrier, for using the filtered BPSK signal and the filtered complex sample signal on the main carrier to calculate the fading coefficient, and for multiplying the OFDM symbol vector by the fading coefficient; and an output device for generating an output signal in response to the AM band frequencies on the radio channel. 23. The receiver for OFDM symbol vectors on the AM band from the radio channel consists of: an input for the AM band on the radio channel; an equalizer for handling line symbols in the symbol vector; a filter for the center band of the line symbol vector to generate an approximate median of the line symbol vector; a device for smoothing the median of the symbol vector with respect to time and frequency; a device for using the smoothed median to calculate the equalization coefficient; and a device for multiplying the OFDM symbol vector by the equalization coefficient; and an output device for generating an output signal in response to the AM band on the radio channel. 24. Receiver for OFDM symbol vectors on the AM band from the radio channel. The receiver consists of: input for the AM band on the radio channel; an equalizer for handling row symbols in the symbol vector, for calculating the logarithm of row symbol vector variance to adjust the logarithm of symbol vector variance over time and frequency, for using the adjusted logarithm to calculate various equalization coefficients, and for multiplying the OFDM symbol by the equalization coefficient; and an output device for generating an output in response to the AM band on the radio channel. 25. Receiver for OFDM symbol vector on AM band from radio channel. The receiver consists of: input for AM band on radio channel; method for adding secondary and/or tertiary barrier to the AM band on radio channel; fading coefficient, for calculating the fading coefficient and multiplying the OFDM symbol vector by the fading coefficient to obtain the OFDM symbol vector; and channel equalizer for calculating the channel equalizer and multiplying the flattened OFDM symbol vector by the channel equalizer to obtain the OFDM symbol vector output; and output device for generating an output in response to the AM band on the radio channel.