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| Number | Title | Issue Date |
| 5461622 | Method and apparatus for using SONET overheat to align multiple inverse multiplexed data streams A super-rate signal is split (213) by an inverse multiplexer (200) into plural SONET STS-1 signals for transmission over separate facilities. At the receiver (500) the plural received signals are likely to have misaligned frames and payloads within the fr... | 10/24/1995 |
| 5440594 | Method and apparatus for joint optimization of transmitted pulse shape and receiver timing in digital systems In digital transmission, the combination of transmitted pulse shape and receiver sampling time that maximizes the magnitude of the channel output pulse sample is determined. The transmitted pulse shape is represented as a linear combination of orthonormal... | 08/08/1995 |
| 5436626 | Variable-length codeword encoder A variable-length codeword encoder is disclosed which produces 8-bit output segments for storage in a buffer (23) for subsequent transmission over a transmission channel (24). The encoder includes two memory tables (15, 16), which produce in response to e... | 07/25/1995 |
| 5426641 | Adaptive class AB amplifier for TDMA wireless communications systems In a TDM/TDMA portable radio communications system, the modulated RF signal transmitted by a portable handset unit is amplified for uplink transmission to a port by an adaptive class AB power amplifier. A class AB amplifier provides the necessary amplific... | 06/20/1995 |
| 5412658 | Beacon detection method and apparatus for sharing spectrum between wireless communications systems and fixed microwave systems A system for spectrum sharing between a point-to-point microwave system and a TDM/TDMA wireless communications system in a common geographical area is described. Each transmitter/receiver in the point-to-point microwave system transmits, in addition to it... | 05/02/1995 |
| 5392154 | Self-regulating multiwavelength optical amplifier module for scalable lightwave communications systems In a multiwavelength lightwave communications system automatic self-power regulation on a channel-by-channel basis is achieved with a cascade of multiwavelength amplifier modules (200), wherein each multiwavelength amplifier module in the cascade includes... | 02/21/1995 |
| 5363376 | Method and apparatus for synchronizing timing among radio ports in wireless communications systems In a TDM/TDMA digital radio communications system, time synchronization between fixed ports is achieved by adjusting the timing of a first port in response to the average timing difference between the timing of that first port and the timing measured by t... | 11/08/1994 |
| 5363375 | Method and apparatus for synchronizing timing among radio ports in wireless communications systems using hierarchical scheme In a TDM/TDMA digital radio communications system a few selected ports are connected to a fixed common timing reference and designated as master ports. Each master port is assigned a hierarchical value of zero. Every other port is initialized a high hiera... | 11/08/1994 |
| 5361258 | Beacon detection system for sharing spectrum between wireless communications systems and fixed microwave systems A system for spectrum sharing between a point-to-point microwave system and a TDM/TDMA wireless communications system in a common geographical area is described. Each transmitter/receiver in the point-to-point microwave system transmits, in addition to it... | 11/01/1994 |
| 5353283 | General internet method for routing packets in a communications network A method for transmitting a packet via a sequence of nodes in a network is disclosed. The transmitted-packet contains a sequence of one or more identifiers in a sequence of fields 410, 420, 430, 440, 450, 460, 470, 480 and a pointer pointing to a particul... | 10/04/1994 |
| 5345332 | Fiber amplifier cascade for multiwavelength lightwave communications system In a multiwavelength lightwave communications system channel-by-channel power regulation is achieved with a cascade of inhomogeneously broadened saturated fiber amplifiers spaced along the optical fiber transmission path. In the described embodiment, inho... | 09/06/1994 |
| 5333175 | Method and apparatus for dynamic power control in TDMA portable radio systems In a TDM/TDMA portable radio communications system the uplink power transmitted by the transmitter of a portable unit to a fixed port is dynamically controlled by monitoring three measures in each uplink burst received by the port. These measures are a re... | 07/26/1994 |
| 5327552 | Method and system for correcting routing errors due to packet deflections A distributed and adaptive method and system are provided for correcting routing errors due to packet deflections in a dual-shuffle exchange network (DSN). The DSN includes a shuffle-exchange network (SN) and an unshuffle-exchange network (USN). A packet ... | 07/05/1994 |
| 5311610 | Low-stress coupling of electrooptical device to optical fiber An electrooptical device, such as a semiconductor laser, and an optical fiber are packaged together in light coupling alignment using an electrolytic technique that avoids heat-induced stresses that commonly result from joining methods that employ welding... | 05/10/1994 |
| 5303078 | Apparatus and method for large scale ATM switching Apparatus and method for large scale asynchronous transfer mode (ATM) switching utilizing tunable lasers and fixed-tuned receivers are provided. The apparatus, an optical switch, includes a plurality of input modules for receiving ATM cells to be switched... | 04/12/1994 |
| 5276525 | Two-dimensional block scanning for subband image and video coding A signal coder is disclosed with improved compression of pictorial data that has been decomposed into plural subbands through a two-dimensional quadrature-mirror decomposition (102). In each of the higher frequency bands, the decomposed samples are quanti... | 01/04/1994 |
| 5260978 | Synchronous residual time stamp for timing recovery in a broadband network A Residual Time Stamp (RTS) technique provides a method and apparatus for recovering the timing signal of a constant bit rate input service signal at the destination node of a synchronous ATM telecommunication network. At the source node, a free-running P... | 11/09/1993 |
| 5253058 | Efficient coding scheme for multilevel video transmission A highly efficient video coding scheme is disclosed which codes, for transmission, the pel values of a scanned high quality HDTV video signal in such a manner that a low-quality version of the signal as well as a high-quality version are available to diff... | 10/12/1993 |
| 5245338 | High-speed variable-length decoder A variable-length decoder is disclosed which includes a decoder part (101) and an interface part (102). The decoder part includes two decoder latches (110 and 111) which store consecutive sequences of bits, which are each equal in length to the maximum-le... | 09/14/1993 |
| 5235420 | Multilayer universal video coder A video coder is disclosed which codes the digital pel values of a video signal in such a manner that different levels of picture quality, i.e. resolution, are available to users. The coder uses a two-dimensional quadrature-mirror filter (103) to decompos... | 08/10/1993 |
| 5226045 | Method and apparatus for autonomous selective routing during radio access in TDMA portable radio systems In a TDM/TDMA digital radio communications system, each portable unit in accessing the system must select the "best" port through which to route each call. The so called "best" port may not, however, have an idle time-slot to accommodate the call. Attempt... | 07/06/1993 |
| 5222101 | Phase equalizer for TDMA portable radio systems A receiver for use in the port or portable units in a TDM/TDMA digital radio communications system is disclosed which incorporates an equalizer (107) to compensate for channel distortion due to multipath delay spread. Each received burst of information is... | 06/22/1993 |
| 5214506 | Low bit-rate video coding technique In a low bit-rate video coder which processes the pels in each video frame on a block-by-block basis using a hybrid differential pulse code modulation and discrete cosine transformation as defined in CCITT Recommendation H.261, the blocks are processed in... | 05/25/1993 |
| 5212831 | Method and apparatus for autonomous adaptive frequency assignment in TDMA portable radio systems To assign and coordinate radio frequencies at the fixed ports (30, 40, 50, 70) of a frequency-reusing radio communications system (5), most existing methods require pre-engineering or impose high complexity in system controller and port hardware. A simple... | 05/18/1993 |
| 5200820 | Block-matching motion estimator for video coder A method and apparatus (110) for performing block-matching motion estimation in a video coder is disclosed which estimates the motion vector associated with each block of pels in the current coding frame. The motion vector for each block in the current fr... | 04/06/1993 |
| 5177634 | High gain limiting erbium-doped fiber amplifier with wide dynamic range An optical limiting amplifier is disclosed having a high gain over a wide dynamic range of input power levels. The amplifier has an input stage (102) and an output stage (103), each of which includes an erbium-doped fiber amplifier (104, 106). The erbium-... | 01/05/1993 |
| 5173695 | High-speed flexible variable-length-code decoder A variable-length decoder is disclosed in which a received variable-word-length encoded bit stream is input to a buffer (102) and read out in parallel sequences equal in length to the maximum length codeword. These sequences are read into cascaded latches... | 12/22/1992 |
| 5155742 | Time dispersion equalizer receiver with a time-reversal structure for TDMA portable radio systems A receiver for use in the port or portable units in a TDM/TDMA digital radio communications system is disclosed which incorporates an equalizer (107) to compensate for channel distortion due to multipath delay spread. Each received burst of information is... | 10/13/1992 |
| 5097331 | Multiple block-size transform video coding using an asymmetric sub-band structure A sub-band coder for video signals is disclosed, which is easily realizable in VLSI due to its simple structure. The coder uses sets of two-tap finite impulse response (FIR) filters having equal-magnitude coefficients to decompose the video signal at mult... | 03/17/1992 |
| 5055841 | High-speed feedforward variable word length decoder A variable word length (VWL) decoder is disclosed in which an input bit stream of variable length words is input to a programmable logic array (PLA) (305) through an input shift register (302). The data association input plane (306) of the PLA compares th... | 10/08/1991 |
