Abstract: A method and program for determining the PN generator mask which is required to obtain a specific shift of the PN sequence at the output of a phase shift network (PSN), relative to the reference sequence that is represented by the inverse of the characteristic polynomial of the PN sequence. The method applies for any initial loading (state) of the PN generator, which can be either the simple shift register generator (SSRG) type or the modular shift register generator (MSRG) type of linear feedback shift register (LFSR). The application of the present invention includes, but is not limited to, any code division multiple access (CDMA) cellular telephone system which requires a method for generating specific shifts of a given reference PN sequence for each base station and each mobile station in the network.

Abstract: A method for determining the amounts of channel powers in the orthogonally multiplexed forward link of a CDMA cellular telephone or PCS system required to provide sufficiently high signal levels for these channels at the location of a mobile telephone receiver at or near the edge of the cell. The method first formulates the power requirements for the several types of forward link channels as a system of equations in the with the powers as variables, parametric in several parameters, including the number of active traffic channels, that vary with time. The method then proceeds to solve the system of equations to determine time varying powers of the pilot, synchronization, and paging channels; it also determines a value of the required power for a traffic channel that is useful for initializing the existing closed loop forward traffic channel power control of the system.

Abstract: Solutions of salts, especially sodium salts, of acrylamidoalkanesulfonic acids in organic liquids such as dimethylformamide are prepared by reacting the acid with a metal salt of a weak acid (preferably a metal carbonate or bicarbonate), or a cation exchange resin in the metal salt form, in the organic liquid in the presence of a free radical polymerization inhibitor (preferably an oxygen-containing gas such as air with which the mixture is blown) until the neutralization number of the mixture to phenolphthalein is a base number or, if an acid number, is no higher than about 1.0. In a preferred embodiment of the process, the mixture is blown with air and such blowing is continued until the acid number of the system is no greater than about 1.0, after which a strongly alkaline reagent is added until the neutralization number is a base number or an acid number no higher than about 0.1.