摘要:
A parallel precoder circuit executes an EXOR operation on an n-row parallel input, and outputs an n-row parallel output, where 2≦n. Outputs of EXOR circuits each of which having a largest column number from among EXOR circuits disposed in first to (n−1)th rows become first-row to (n−1)th-row parallel outputs, respectively. A output of an nth-row delay circuit becomes an nth-row parallel output.
摘要:
An optical signal receiving equipment including an optical-electrical converter configured to convert optical signals into electronic signals; first deciders configured to transform the electronic signals into first binary signals; a second decider configured to transform the electronic signals into a second binary signal; a decision encoder configured to compute identification signals based on the plurality of first binary signals, and to compute reliability information of the computed identification signals; a converter configured to combine the identification signals and the second binary signal to combined identification signals; and a controller configured to execute an initial identification of the electronic signals in any one of the plurality of first deciders by using an initial threshold level in the plurality of first deciders, to measure an average amplitude of the electronic signals, and to correct the threshold level of the plurality of first deciders based on a variation of the average amplitude of the electronic signals.
摘要:
A parallel precoder circuit executes a differential encoding operation on an n-row parallel input information series, and outputs an n-row parallel output information series, where 2≦n. Output sets of differential encoding operation circuits each of which having a largest column number from among differential encoding operation circuits disposed in first row to (n−1)th row become first-row to (n−1)th-row parallel outputs information series, and an output set of an nth-row delay circuit becomes nth-row parallel output information series.
摘要:
An air compressor includes a compressor unit, an intake regulator valve connected to the compressor unit, and intake filter connected to the intake regulator valve, an oil separator connected to the compressor unit, an oil supply line connecting the lower part of the oil separator to various points inside the compressor unit, and an oil return line connecting the oil collector unit to the passage connecting the intake filter and the intake regulator valve. The passage connecting the intake filter to the intake regulator valve has a section of reduced cross-sectional area, including an inner tube having holes to connect to a surrounding hollow region. The oil return line opens into the passage at a point higher than the level of oil in the intake regulator valve.
摘要:
Novel nitrogen-containing heterocyclic compounds shown by the formula ##STR1## wherein one of R.sub.1 and R.sub.2 represents a lower alkyl group, a phenyl group, a halophenyl group, or a lower alkoxyphenyl group and the other of them represents a hydrogen atom, a lower alkyl group, or a phenyl lower alkyl group; said R.sub.1 and R.sub.2 may combine with each other to form a trimethylene group or a tetramethylene group; R.sub.3 represents a hydrogen atom, a lower alkyl group, a phenyl group, or a phenyl lower alkyl group; X represents an oxygen atom, a sulfur atom, an imino group, or a group shown by ##STR2## wherein m represents 1 or 2 and R.sub.4 represents a lower alkyl group, a hydroxy lower alkyl group, a cycloalkyl group or a phenyl lower alkyl group; and Y represents an ethylene group which may be substituted by lower alkyl group, a trimethylene group, a tetramethylene group, a vinylene group which may be substituted by a lower alkyl group, or ##STR3## wherein R.sub.5 represents a hydrogen atom, a lower alkyl group, a trifluoromethyl group, or a phenyl group; said X is the group shown by ##STR4##when one of said R.sub.1 and R.sub.2 is a lower alkyl group and the other is a hydrogen atom, and said Y is an ethylene group, and the pharmacologically acceptable non-toxic salts thereof. The compounds described above are strong analgesic anti-inflammatory agents.
摘要:
An input bit error ratio estimating method executed by a communication control unit includes a computing, a condition determining, a first input BER estimating, a second input BER estimating, a third input BER estimating, and an input BER estimation result outputting. In the condition determining, the communication control unit determines which of a plurality of conditions set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio. Based on the condition that is determined in the condition determining as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, selects one of the first input BER estimating to the third input BER estimating and executes the selected processing.
摘要:
An error correction encoding device includes an outer encoding circuit that performs encoding processing for an outer code and an inner encoding circuit that performs encoding processing for an inner code. The inner encoding circuit includes an inner-encoding input circuit that performs interleaving processing in which a parallel input sequence is divided into lanes and in which a barrel shift is performed for each inner frame in the lanes. Thus, allocation ratios between an information sequence area and a parity sequence area are made uniform.
摘要:
Provided is an error correction encoder that performs coding on both a transmission area and a redundancy area of the transmission frame by using a product code, and when excess or deficiency is arisen with respect to allocation of an information sequence area and/or a parity sequence area in a product code frame generated by the coding using the product code, non-uniformly allocate the information sequence area to the parity sequence area, and/or non-uniformly allocate the parity sequence area to the information sequence area, where each of the non-uniform allocations is performed in accordance with the arisen excess or deficiency.
摘要:
An optical network system includes a first node that converts input signals of n systems into optical signals having wavelengths different for each of the systems and wavelength-multiplexes and transmits the optical signals and a second node that selects signals of n systems from the wavelength-multiplexed signals and outputs the signals. The first node includes an optical coupler that divides the input signals into operating system signals and redundant signals, TPNDs that convert the operating systems into optical signals, an optical switch that selects standby system signals from the redundant signals, and a TPND that converts the standby system signals into optical signals in a storage mode corresponding to a type of the standby system signals. The second node includes TPNDs that convert the optical signals converted from the operating system signals into signals of a type corresponding to the input signals, a TPND that converts the optical signals of the standby system signals into signals of the type of the input signals in a storage mode corresponding to the standby system signals, and an optical switch that selects an output destination of the signals output from the TPND.
摘要:
An optical receiving apparatus includes: an A/D converting circuit; a received-signal demodulating circuit that demodulates a received digital signal from the A/D converting circuit into an m-bit received signal; a soft-decision-data generating circuit that generates n-bit (n≦m) soft-decision data based on the m-bit received signal; and an error correcting circuit that performs error correction based on the n-bit soft-decision data and outputs an error-corrected received signal. The soft-decision-data generating circuit generates soft-decision data of n bits (n=p+1) that corresponds to a determination result according to 2n−1 soft-decision thresholds, by using an MSB of the m-bit received signal as hard-decision data, and by using, as reliability information, a result of comparison between a plurality of bits (k bits, where k≦m) on an MSB side of the m-bit received signal and a fixed threshold, or p bits (p≦m−k) selected from (m−k) bits on an LSB side of the m-bit received signal.