Abstract: A system and method for initial ranging in wireless communication systems is provided. A plurality of orthogonal frequency division multiplexing (OFDM) blocks are received by an OFDMA base station transceiver from a plurality of remote user devices in wireless communication with the base station. A ranging subchannel is extracted from the OFDM blocks. The number of active codes in the ranging subchannel is determined, active codes are identified, and carrier frequency offsets (CFOs) are estimated for each active code. Timing delays and power levels for each active code are then estimated. The estimated CFOs, timing delays, and power levels are broadcasted by the base station to the remote user devices, so that the user devices can utilize same to adjust transmission parameters to optimize power levels and synchronize communication with the base station.

Abstract: A method for initial synchronisation in a random access procedure in LTE standards provides dividing the Physical Random Access Channel (PRACH) into a plurality of tiles, each comprising by a adjacent subcarriers, over which the channel response is assumed to be substantially flat, i.e. the frequency response is replaced over each subcarrier of a tile with an average frequency response. In an embodiment, an algorithm for initial synchronization is provided on the basis of a generalized likelihood ratio test (GLRT).

Abstract: A system and method for initial ranging in wireless communication systems is provided. A plurality of orthogonal frequency division multiplexing (OFDM) blocks are received by an OFDMA base station transceiver from a plurality of remote user devices in wireless communication with the base station. A ranging subchannel is extracted from the OFDM blocks. The number of active codes in the ranging subchannel is determined, active codes are identified, and carrier frequency offsets (CFOs) are estimated for each active code. Timing delays and power levels for each active code are then estimated. The estimated CFOs, timing delays, and power levels are broadcasted by the base station to the remote user devices, so that the user devices can utilize same to adjust transmission parameters to optimize power levels and synchronize communication with the base station.

Abstract: A system and method for initial ranging in wireless communication systems is provided. A plurality of orthogonal frequency division multiplexing (OFDM) blocks are received by an OFDMA base station transceiver from a plurality of remote user devices in wireless communication with the base station. A ranging subchannel is extracted from the OFDM blocks. The number of active codes in the ranging subchannel is determined, active codes are identified, and carrier frequency offsets (CFOs) are estimated for each active code. Timing delays and power levels for each active code are then estimated. The estimated CFOs, timing delays, and power levels are broadcasted by the base station to the remote user devices, so that the user devices can utilize same to adjust transmission parameters to optimize power levels and synchronize communication with the base station.

Abstract: A system and method for initial ranging in wireless communication systems is provided. A plurality of orthogonal frequency division multiplexing (OFDM) blocks are received by an OFDMA base station transceiver from a plurality of remote user devices in wireless communication with the base station. A ranging subchannel is extracted from the OFDM blocks. The number of active codes in the ranging subchannel is determined, active codes are identified, and carrier frequency offsets (CFOs) are estimated for each active code. Timing delays and power levels for each active code are then estimated. The estimated CFOs, timing delays, and power levels are broadcasted by the base station to the remote user devices, so that the user devices can utilize same to adjust transmission parameters to optimize power levels and synchronize communication with the base station.

Abstract: A modular worktable assembly and a shelving unit are described. The modular worktable assembly has a pair of side panels with a tabletop secured over a top end thereof. A rear, hollow cross-channel is secured between rear vertical end posts of the side panels and has an open top end with a removable cover member for access to an interior thereof. The table platform is held horizontal and elevated above the top edge of the side panels and flush with a top end of the rear hollow cross-channel. The modular shelving unit is characterized in that it has vertical side panels which are formed by a pair of symmetrical side walls immovably secured back-to-back and these side walls each have a pair of outwardly projecting elongated formations formed in a front and rear portion thereof. A plurality of horizontally aligned connecting slots are provided in these formations.

Abstract: A modular worktable assembly and a shelving unit are described. The modular worktable assembly has a pair of side panels with a tabletop secured over a top end thereof. A rear, hollow cross-channel is secured between rear vertical end posts of the side panels and has an open top end with a removable cover member for access to an interior thereof. The table platform is held horizontal and elevated above the top edge of the side panels and flush with a top end of the rear hollow cross-channel. The modular shelving unit is characterized in that it has vertical side panels which are formed by a pair of symmetrical side walls immovably secured back-to-back and these side walls each have a pair of outwardly projecting elongated formations formed in a front and rear portion thereof. A plurality of horizontally aligned connecting slots are provided in these formations.