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"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 7280806 | Communication system At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point g... | 10/09/2007 |
| 7023792 | Transmitter for spread-spectrum communication A multiplexing timing signal generator (1) generates a multiplexing timing signal activated for each interval corresponding to a number of chips delayed in multiplexing between data to be transmitted. Driven by the multiplexing timing being active, each opera... | 04/04/2006 |
| 6347391 | Radio communication apparatus A signal received by a receiving antenna is input to an UDMV through a detector, and compensation for distortion caused by multipath fading and an error correction using Viterbi decoding are simultaneously performed, obtaining demodulation data. The UDMV ... | 02/12/2002 |
| 6256358 | Digital signal processing architecture for multi-band radio receiver A digital signal processing architecture for an audio system combines multiple functions in programmable and reconfigurable blocks to achieve an efficient use of hardware and chip area. AM, FM, and audio functions can be performed using the same reconfigu... | 07/03/2001 |
| 6192070 | Universal modem for digital video, audio and data communications A universal modem has a software-configurable modulator/demodulator which accommodates different modulation formats such as those associated with terrestrial, cable, phone line, satellite and wireless communications to be transmitted and received through ... | 02/20/2001 |
| 5553101 | Demodulation logic unit adaptable to multiple data protocols A data demodulation logic unit (200) and method used therein, adaptable to multiple data protocols, including an arithmetic logic unit (205) that is architecturally optimized to demodulate multiple data protocols under the control of a hardware based stat... | 09/03/1996 |
| 5423001 | Data transmission and apparatus, data processing apparatus and a neural network which utilize phase shifted, modulated, convolutable pseudo noise A data transmission method includes a step which modulates maximal-sequence codes which are phase shifted by different phase shift quantities based upon plural data for transmission, a step which then convolutes the modulated maximal-sequence codes to obt... | 06/06/1995 |
| 4429280 | Apparatus and method for demodulation of a modulated curl-free magnetic vector potential field A system for determining the modulation imposed on a curl-free magnetic vector potential field. The system includes apparatus for detecting the curl-free magnetic vector potential field component by means of a Josephson junction. The magnetic vector poten... | 01/31/1984 |
| 4298842 | Heteropolar machine for demodulating polyphase voltages interfering among themselves A demodulator for the demodulation of polyphase voltages of n phases, interfering among themselves which constitute a system of polyphase pseudo-sinusoidal voltages modulated in amplitude to a pulsation &3xb5;, in order to obtain a system of polyphase vol... | 11/03/1981 |
| 4065722 | Demodulation method and circuit for discretely modulated ac signals Demodulation of an ac signal that has been modulated by discrete changes in its amplitude, frequency or phase, is effected by first feeding the modulated ac signal through an amplitude limiter and hence through a bandpass filter tuned to a preselected fre... | 12/27/1977 |
