TH22982B - Spiral decoder crossover reducer for decoding of code. It is actually crossover suitable for use in multi-channel receivers of digital television. That was crammed with forward fault correction, sent via terrestrial and wired satellites. - Google Patents

Abstract

A crossover reducer that can reduce 8-PSK and 16, 32, 64,128, and 256 QAM crossover code generation, consisting of the I-channel RAMs, the Q-channel and the regenerator, the 8-PSK generation reducer logic section, and Each RAMs selection consists of a search table that is programmed for each one of the QAM RAM codes, such as I and RAN. Each Q channel has a storage capacity of 768 twists and is forwarded through the MUX selection accordingly. Reducer effect Crossover in response to QAM crossover code, which will be an even force of 2 (ie 16, 64, or 256) chosen in response to the QAM crossover, which is an odd force of 2 (ie 32 or 128). When selected, the output of RAM I and RAM Q is used by the input to the regenerator RAM with 320-bit storage capacity, and the regenerative RAM output is forwarded through the MUX selection. As the result comes out the crossover reducer. In response to the selected 8-PSK crossover code, the output of the 8-PSK generation reducer logic section is forwarded through the MUX selection as the crossover output results. This model is structurally efficient. And need capacity Minimal storage Compared to the cross code generation reducer ROM storage for 16, 32, 64,128, and 256 QAM and 8-PSK cross-codes.

Claims (9)

1. Spiral Decoder Of a group of real cross-code Where each code will be Determined by the order of the group of symbols Rotary encoder It is used as a single-phase (I) and 90 ° differential (Q) digital input, where a group of actual crossover codes consists of different codes for each group of symbols in the I, Q system consisting of a pair of 2 numbers of Symbols arranged in Creating bits to symbols A rectangle to create a group of square symbols. With a lot of The best of the symbols The rectangle contains a 22y symbol, where Y is the positive sum that One with a rating of at least 2 and where the spiral decoder Contains a crossover reducer for reducing the generation of individual blocks of actual crossover code. Improvements that (1) the creation of bits to the symbol of the rectangles of each group. This is how the alternate cells of the second row of the rectangle define the second subgroup of the symbol. The remaining cells of the odd rows of the rectangle define the second subset of the symbol. Alternating cells of an even row of rectangles define the subgroups that Three symbols And the remaining cells of an even row of rectangles define the fourth subgroup of symbols and (2) the crossover reducer contains Random Access Memory (RAM) Channel I, with a depth of 2 (x + 2), a storage location, where X is a second positive integer greater than the first positive integer. In which each position Storage has a minimum width that is sufficient. To store the ingestion of the I designation table of the Y bit RAM channel Q with a depth of 2 (x + 2). Which each storage location has The minimum width is sufficient To hold the forwarding of the table, look up the Q designation of the first Y bit for the first X bit input to the RAM channel I to configure. For the same digital input phase (I) and for sending the second X bit input to the RAM Q channel to determine the value of the digital input. Second quadrant (Q) for sending a 2-bit input to both the RAM I channel and the Q RAM to configure the digital input. The second quad-carger (Q) for sending 2-bit input to both the RAM I channel and the Q RAM to define one group selected from the four subgroups. According to the binary value of the 2-bit input, the third part is used for preloading. RAM channel I lookup table by a group selected from a group of symbols that generate the I element bits of that symbol of one group. Sub-selected from the four sub-groups of the major groups from that group. Next to the value set by the same digital input phase (I) to the RAM, channel I is read out as a RAM output, channel I and a fourth for preloading. Search table for Q RAM by one group Selected from a group of symbols that generate the Q element bit of the said symbol of one group. Sub-selected from four subgroups of one group selected from the group. Next to the value set by the input signal The digital quad-carriage (Q) to the RAM Q channel is read out as the output of the Q-channel RAM. 2. Spiral decoder. Given in claim 1, generating bits to the symbol of the square. Of each group will be in a way that The third uses the binary gray encoded bits. To generate RAM preloaded lookup table bits, slots I and the fourth use gray encoded binary bits. To create a lookup table bit Preloaded RAM channel Q 3. Spiral decoder. Given in claim 2, the group of symbols in the planes I, Q consists of two distinct powers. The symbols arranged in a square contain 16 QAM symbols, 64 QAM symbols, and 256 QAM symbols. The value of Y is 3; And the value of X is 6. 4. Spiral decoder Given in claim 1, a group of actual cross code. It also contains a different code for each group of A symbol in the plane I, Q that contains an odd number of 2 numbers of symbols. Arranged in Create bits to symbols Cross frame to create a group of cross frame symbols. With the greatest number of The cross-frame symbol group consists of 2Z symbols, where Z is the third positive integer with a nominal value of 5, where the X value of the second positive integer is greater than Z / 2, and the generation of bits to Symbols of the cross frame Each group is an alternate cell of the odd rows of the crosstab that defines the subgroup. One of the symbols The remaining cells of the odd rows of a cross frame define the second subset of the symbol. Alternating cells of an even row of a cross frame Will define the third subgroup asking for symbols And the rest of the row A pair of cross frames It defines the fourth subgroup of symbols and which lookup table of RAM slot I when it is preloaded. By the third by one group Selected from a group The odd power of two symbols serves (I) to generate bits to the symbol. The same for the I element of each one of the 4 subgroups and (2) creating bits to This symbol consists of a given number of columns of a rectangle. Where the given number of columns is the maximum number of columns in one of the four subgroups of the crosstab of the selected group. From the group of odd powers of two symbols Q-Slot RAM Lookup Table When Preloaded By the fourth part according to one group Selecting from an odd power group of two symbols serves (1) providing bit generation to identical symbols for the Q elements of each one of the 4 subgroups and (2) bit generation to. This symbol consists of a given number of rows of a rectangle. In which a given number of rows will Is the maximum number of rows in one of the four subgroups of the crosstab. Of one group selected from the group of The odd power of the two symbols and the crossover reducer consists of (1) RAM, a regenerator responding to 2-bit input, RAM output value I, and RAM output Q channel that is used by value. Enter for Regeneration of the bit generation to the square of the symbol defined by both the I elements formed at the RAM exit point I and the Q elements generated at the RAM exit point Q to generate bits to the frame symbol. square At the exit of the new generator Which square frame The output of the new constructor contains Either the designated symbol cells that create any one Of the four subgroups And at least one additional symbol cell located at at least one corner of the new generator output rectangle Creating an additional symbol bitcell is the iteration of generating bits of the symbol cell. Determines to be positioned successively with one corner of the rectangle and (2) an optional (a) that responds to one selected group from an odd power group of two symbols for forwarding of the output. Regenerator RAM as a result of a crossover reducer and (b) that responds to one selected group from a pair of two symbols for forwarding. The direct output of the output in the order of RAM I slot and RAM Q channel as a result of the reducer. Crossover build 5. The rotary decoder defined in claim 4, the exact group of symbols will represent an odd power of 2, the number of symbols equal to 5 out of the RAM. Slot I consists of 2 bits that will be limited to display only. 3 out of 4 of the possible binary values, of which these 3 binary values define 3 columns of a 3 x 3 rectangle, with 8 subgroups of asymmetric symbols. It's inside a 3 x 3 rectangle where bits are being built. To a different symbol for each one of the 4 subgroups at the generator exit point. New, which creates a single additional symbol cell for each separate one of the 4 subgroups and a single additional symbol cell is positioned at 4 different corners of the 3 x 3 rectangle, only the frame corresponding to each of the separate one. 4 subgroups 6. Spiral decoder, given in claim 4. The exact group of symbols represents the given odd power of two numbers. More than 5 symbols, where each symbol of one of the 4 subgroups of a certain group of forces Specified odds of 2. Number of symbols greater than 5 are arranged in a cross-frame output from RAM. Slot I consists of groups of at least 3 bits, where the number of symbols greater than 5 is arranged in a crossover frame. The second base value represented by a bit group is limited to the K number of columns in a crosstab of any of the four subgroups, where K is the fourth positive integer out of the RAM. At least 3 bits, where the number of The binary value represented by a group of bits. Will be limited to displaying the K number of columns in a crosstab of any of the four subgroups. Where there will be subgroups of symbols, frames, cross, symmetry That is placed inside the K x K rectangle where the bits are formed. To the same symbol For each one of the 4 subgroups at the exit point of the new generator, the duplicate bits generate at least one additional symbol cell address each of the four corners of the frame K x K for each of the four subgroups. 7. Spiral Decoder. As defined in claim 4, the generating bit to symbol occurs at each exit point of the I-channel RAM, Q-channel RAM, and the regenerate RAM, consisting of the 8-binary gay code bits. Holds 7 groups of symbols in the I plane, Q that contains two distinct powers of two. The number of symbols arranged in a rectangular frame contains 16 QAM group symbols, 64 QAM group symbols and 256 QAM group symbols. I, Q are composed of two distinct powers. The number of symbols arranged in a cross frame contains 32 QAM symbols and 128 QAM symbols. The value of Y is 3; The value of Z is 7; and the value of X is 6. 9. The rotary decoder, given in claim 8, the group of true cross-code also contains different codes for the 8-PSK group of 8 symbols in the I plane, Q of which 8 symbols are symmetrically distributed around the beginning of the plane I, Q with each one of the 8 symbols angularly differentiated, 22.5 ํ along the axes of the planes I, Q, and the 8-PSK group of 8 symbols. Bits are generated to 3-bit notation where the 8-PSK group is divided into 4 subgroups, each containing 2 symbols based on the binary value represented by the 2-bit significance. A minimum of 3 bits and 2 symbols of each one of the 4 subgroups will be differentiated by value. The binary represented by the most significant 1 bit of the 3 bit crossover reducer, followed by the 8-PSK generation reducer logic that responds to (1) the first X bit input value. Used as the first input to determine the value of the same phase digital input symbol (I), (2) the second X bit input that will be used as the second input to determine the value of the digital input symbol. The (Q) and (3) 2-bit input is used as a 3-bit input to select one of the 4 subgroups of the 8-PSK group based on the binary value represented by the 2-bit input. Used and in response to the first, second, and third input, the 8-PSK generation reducer logic obtains a 1-bit output representing the binary value of 1, the most significant bit of the 3-bit generation. Bit to symbol This will represent one of the 2 symbols of one selected subgroup from the 4 subgroups of the 8-PSK group with adjacent distance (I + Q) with the position of the symbols in the I, Q plane determined by the respective values of the symbols. The same digital input phase (I) used as the first input, and the quadcopter digital input (Q) used as the second input and selector that also responded to the selection of the 8-PSK group sent. Go ahead, where a 1-bit output from the 8-PSK generation reducer logic portion is the output of the crossover reducer 1.0. The rotary decoder given in claim 9, bit generation. To the symbol of 8, the 8-PSK group symbol is such that the symbol in the first quadrant of the plane I, Q, fixed at 22.5 along the I axis, is formed with the binary value 000, the symbol in the quadrant. The first point of the I, Q planes fixed at 22.5 ํ along the Q axis is formed with the binary value 001, the symbol in the second quarter of the I, Q planes fixed at 22.5 ํ along the I axis is Created with the binary value 010, the symbols in the second quadrant of the I, G plane assigned at 22.5 ํ along the Q axis are formed with the binary value 011, the symbol in the third quadrant of the plane I, G. The I, Q assigned at 22.5 ํ along the I axis are formed with 100 binary numbers. The symbols in the third quadrant of the I, Q plane, determined at 22.5 ํ along the Q axis, are formed with the base value. Two 101, the symbols in the fourth quadrant of the I, Q planes fixed at 22.5 ํ along the I axis are formed with the binary value 110 and the symbol in the fourth quadrant of the I, Q plane. Set at 22.5 ํ along the Q axis, it is formed with the binary value 111; And an 8-PSK generation reducer logic section containing a section for inheriting the binary value of "1" for a 1-bit output only if the result of the numerical value of the same digital input phase symbol (I) multiplies the numerical value of I1. Less than the result of the numerical value of the digital quadrant (Q) input, multiplies the numerical value of Q2 where the numerical value of I1 is 9 for subgroup 00, 4 for subgroup 01, -9 for subgroup 10, and -4 for subgroup 11 and the numerical value of Q2 is -4 for subgroup 00, -9 for subgroup 01, -4 for subgroup 10, and -9 for subgroup 11 1. 1. Spiral decoder as given in claim 10, the spiral decoder is a component of the multichannel receiver 1. 2. The Spiral Decoder as defined in claim 11, a multi-channel receiver is a digital television receiver for forward-error correction of compressed digital television reception. Incoming 1 3. In the spiral decoder of a group of real cross code. Which each code is Determined by the order of the group of symbols The same phase (I) and 90 ํ (Q) phase difference (Q) digital input is sent, where the actual cross-code group contains the broken code. Different for each group of symbols in the plane I, Q that contains the odd power of 2 symbols number Arranged to create bits to the cross frame symbols. To create a group of crossover symbols with The largest number of symbols in a cross frame contains 2Z symbols, where Z is an integer. Plus the first with a nominal value of 5 and where the spiral decoder contains a reducer. Create a cross for reducing the actual generation of individual blocks of crossover code. Improvements looking to create a bit go. Also the symbol of the cross frame of each group Will be the type that the alternating cells of the bars of the cross frame will Defines the first subset of the remaining cell symbols of the odd rows of the cross frame. Defines the second subset of the symbol, the alternate cell of the double row of the crosstab, defines the third subset of the symbol and the remaining cells of the even row of the crosstab. It defines the fourth subgroup of the symbol and (2) the drawing reducer. Cross contains Random access memory (RAM) I slot with a depth of 2 (x + 2) the storage location, where x is a second positive integer with more than half the value of the first positive integer. The minimum width sufficient to hold the input of the table, look up the I designation of b bits, where b = z / 2 + 1/2 RAM Q slot with a depth of 2 (x + 2). Which each storage location has Find the Q designation of b bits, part one for sending the first x bit input to RAM, channel I to determine the value of b bit. Same-phase digital input (I), and for sending second x-bit input to RAM, Q for setting value of second-digit quad-digital (Q) input for sending 2-bit input to Both the RAM I slot and the Q RAM are assigned to one subgroup selected from the subgroup. According to the binary value of the 2-bit input, the third part is sent for preloading. RAM channel I lookup table by one group Selected from a group of odd powers of 2 symbols, which generates the I element bit of that symbol of one subgroup selected from the subgroup of one selected from the group. Which is close to the value set by the same digital input phase (I) to the RAM, channel I is read out as a RAM output, channel I to (1) provides bit generation to the same symbol. For the I element of each one of the 4 subgroups and (2) the creation of bits to this symbol consists of a given number of columns. Of a square frame In which the specified number of columns is the maximum number. Of a column in one of the four A subgroup of a crosstab of one selected from the group of odd powers of 2 symbols. The fourth for preloading the RAM search table. Q by one group. Choose from a group of odd powers of two symbols. Which generates the Q element bit of said symbol of one selected subgroup from the four subgroups of the one selected from the group. Which is close to the value Determined by the quad-digital (Q) digital input signal to the RAM, the Q channel is read out according to the RAM output, the Q channel to (1) provides bit generation to the same symbol. For the Q element of each of the 4 subgroups and (2), the bit construction to this symbol consists of a given number of A row of rectangles Where the given number of rows is the maximum number of rows in one of the four subgroups of the crosstab of one group selected from the group of odd powers of 2 symbols; And the regenerator RAM responds to the 2-bit input, the RAM output I channel and the RAM output Q that is used as the input for the regeneration of the bit regeneration. To symbol Of the rectangle of the designated symbol Where both component I born at the RAM exit point I channel and component Q formed at the RAM exit point Q to generate bits to the frame symbol. The rectangle at the exit of the new generator Which the output rectangle of the new generator Contains whole cells Defined symbol that creates any one of the 4 subgroups and at least one additional cell symbol located at at least one corner of the rectangle results in a new generator. Bit of one cell generation The additional symbol is a duplicate of the given symbol bitcell generation. That are positioned successively to one corner of the rectangle 1 4. The rotary decoder given in claim 13, the exact group of symbols will represent an odd power of 2, the number of symbols equal to 5, out of the RAM. Slot I consists of 2 bits that will be eliminated to show only 3 quarters. Of the possible binary values Where three binary values define 3 columns of 3 x3 rectangles resulting from RAM, the Q slot contains 2 bits that will be limited to represent only three quarters of the possible binary values that the 3 binary values will define. 3 rows of 3 x 3 squares, where there are 8 subgroups of asymmetric symbols placed within the 3 x 3 squares, forming bits to different symbols for each one of the 4 subgroups at the exit point of The new generator in which the duplicate bits generate one additional symbol cell for each, one extracted of 4 subgroups and one additional symbol cell. They are located at different corners of each of the four 3x3 squares that correspond to each other. One isolated of 4 subgroups 1 5. The rotary decoder given in claim 13, the exact group of symbols will show the power at A given number of symbols greater than 5, where each symbol of one of the four subgroups of a certain group of a given odd power of 2, the number of symbols greater than 5 is arranged in a cross-frame resulting from RAM. Slot I consists of a group. Containing at least 3 bits where the number of values The binary represented by a group of bits. Is limited to displaying the K number of columns in a crossover frame. Any of the 4 subgroups where K is the fourth positive integer resulting from RAM. The Q channel consists of a group of at least 3 bits, where the number of values is The binary represented by a bit group is limited to the K number of rows in the crosstab of any of the 4 subgroups, where there is a symmetrical crosstitch symbol subgroup inside the K x K rectangle. With bit generation to the same symbol For each one of the 4 subgroups at the exit point of the new generator, which repeats bits will generate at least one additional symbol cell located at each of the 4 corners of the K x K rectangle for each one of the 4 subsets 1. 6. The rotary decoder, given in claim 13, generates bits to symbols that occur at each exit point of the I-channel RAM, the Q-channel RAM, and the re-generator RAM contains 1 binary gray code bit. 7. The rotary decoder, defined in claim 16, a group of symbols in planes I, Q that contains distinct odd powers of two numbers. Symbols arranged in a cross frame It consists of a QAM group of 32 symbols and a QAM group of 128 symbols. The value of Z is 7; And the value of X is 6 1. 8. The rotary decoder, defined in claim 17, the group of true cross-code also contains distinct codes for the 8-PSK group of 8 symbols in the I, Q planes, of which 8 are distributed in a radial symmetry around. The beginning of the I, Q plane with each one of the 8 symbols is angled differently to 22.5 ° along the axes of the planes I, Q and 8-PSK groups of 8 symbols. Bits are generated to 3-bit symbols, which The 8-PSK group is divided into 4 subgroups with 2 symbols in each of the binary groups represented by the 2 least significant bits of the 3 bits and 2 symbols of each of the 4 subgroups are distinguished. Together according to the base value The two represented by the most significant 1-bit of the 3-bit crossover reducer are followed by the 8-PSK generation reducer logic part that responds to (1) the entry X bit. First input to determine the value of the same digital signal phase (1), (2). The second X bit input is used as the second input to determine the value of the digital input. Quadcartier (Q) and (3) 2-bit input used as a third input to select one of the 4 subgroups of the 8-PSK group based on the binary value represented by the 2-bit input used and in. Responding to one, two, and three inputs, the 8-PSK generating reducer logic takes a 1-bit output that will represent the binary value of 1, the most significant bit of the 3-bit generation, to the symbol. This will represent one of the 2 symbols of one selected subgroup from the 4 subgroups of the 8-PSK group that will have a junction (I + Q) with the position of the symbols in the I, Q plane determined by their respective values. Same-phase digital input (I) used as the first input. And the digital quadcartier input (Q) is used as the second input; And a selection (a) that responds to Steams a selected group from an odd power group of 2 symbols for forwarding of the RAM output, the new generator is the output of the crossover builder reducer and (b) responsive to the 8- group selection. The PSK sent forward 1 bit of output from the 8-PSK generation reducer logic part is the output of the crossover 1 reducer. 9. The rotary decoder, given in claim 18, generates bits to the symbols of the 8 symbols of the 8-PSK group, the ones that are symbolized in the quadrant. The first of the I, Q planes fixed at 22.5 ํ with the I axis is formed with the binary value 000, symbol in the quadrant. The first of the I, Q planes fixed at 22.5 ํ the Q axis is formed with the binary number 001, the symbol in the second quadrant of the I, Q planes fixed at 22.5 ํ with the I axis is created. With the binary 010, the symbols in the second quadrant of the I, Q planes assigned to 22.5 the Q axis are formed with binary 01I, symbol in the third quadrant of planes I, Q. The symbol in the third quadrant of the I, Q plane assigned to 22.5 ํ the Q axis is formed with the binary number 101, the symbol. In Quadant The fourth of the I, Q planes fixed at 22.5 ํ the I axis is formed with a binary value of 110 and the symbol in the quadrant. The fourth of the I, Q planes fixed at 22.5 ํ the Q axis is formed with the binary number 111; And the 8-PSK generation reducer logic section contains a section for getting the binary value of "I" for a 1-bit output only. If the numerical result of the same digital input phase (I) multiplies the value by number. Of I1 is less than the result of the numerical value of the digital quadrant (Q) input signal.Multiply the numerical value of Q2, where the numerical value I1 is 9 for subgroup 00,4 for subgroup 01, -9 for subgroup. 10 and -4 for subgroup 11 and numerical value of Q2 is -4 for subgroup 00, -9 for subgroup 01, -4 for subgroup 10 and -9 for subgroup 11.