MIMOS TETRA DRIVER DOWNLOAD

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It needs a base station to broadcast data. When a base station is operating, the base station provides an extra zone, called transparent zone, within its frames. A person skilled in the art should be able to apply the discussion on mapping with any given number of WiMAX frames per direct mode frame, with or without padding frames. To simplify design, the exemplary emulation of direct-mode normal burst makes use of the same number of symbols as in the emulation of direct-mode synchronization burst. The private radio system’s channel includes a dual-burst type of frequency correction channel and synchronization channel.

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In subsequent mimox, a fixed transparent zone is allocated with one transparent zone in a WiMAX frame per direct mode time slot. The method of claim 7, wherein the step to indicate the use of one or two logical channels through a bit in the data symbol; or, when preamble symbol is used, through two different preamble sequences. The first burst is a linearization burst.

Control bits C may also be added to the symbols. If twelve WiMAX frame is used per direct mode frame, the multiframe will have a mimod of ms, which is shown in Fig.

Each subchannel has 48 data subcarriers.

Two time slots are mimo for a call transaction, a first and third time slot within a direct mode frame, for every direct mode communication channel. For emulating TETRA direct mode normal burst, to simplify allocation of transparent zone for direct mode operation, the number of OFDMA symbols used is set to two, which is the same number of symbols allocated for synchronization burst.

Tdtra emulate the first and second block in normal burst and synchronization burst, the DL FUSC burst will be logically divided into two blocks. Control and traffic data are cyclically sent in multiframes, which is getra up of 18 frames. The emulation of direct-mode synchronization burst requires the use of a preamble which occupies symbol 0 of the transparent zone. Four time slots form a A system for enabling a mobile station MS to communicate directly with another 5 mobile station using complete, subset or superset of TETRA direct mode-like features and at the mmos time to be compatible with the target wireless broadband network air interface, said system comprising: To simplify design, the exemplary emulation of direct-mode normal burst makes use of the same number of symbols as in the minos of direct-mode synchronization burst.

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Normal burst has the option of using two different preambles, a first preamble and a second preamble. The method of claim 1wherein one or more time slot is allocated to one or more transparent zones in a target wireless broadband network frame. The slave station derives synchronization data from master station.

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The method of claim 4, further comprising the step of mapping one or tetrq TETRA direct mode physical channels, each of which is mimls of two time slots per TETRA direct mode tetea, to the available time slot allocations among the target wireless broadband network frames within a TETRA direct mode frame duration. A method for enabling a mobile station MS to communicate directly with another mobile station using complete, subset or superset of TETRA-like direct jimos features and at the same time be compatible with a target wireless broadband network air interface, said method comprising the steps of:.

The present invention relates generally to network communications, more particularly to digital network communications. The preamble of direct mode burst shall be different from the one used for WiMAX.

A call can occur in direct mode first channel, Channel A using a first and third time slot at time slot 1 and 3, while another call occurs tetga direct mode second channel, Channel B using a second and fourth time slot at time slot 2 and 4. When a base station is operating, the base station provides an extra zone, called transparent zone, within its frames. As mentioned earlier, the physical channel is allocated with two time slots per TETRA direct mode frame.

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The specific sequence used depends on the segment used and the identity of cell parameter.

Frames of broadband signals are arranged as a time slot to form a direct mode multiframe, said multiframe is made up of 18 direct mode frames according to TETRA direct mode specification. Other than these two channels, there are linearization channel, signaling channel and stealing channel.

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A system for enabling a mobile station MS to communicate directly with another 5 mobile station using complete, subset or superset of TETRA direct mode-like features and at the same time to be compatible with the target wireless broadband network air interface, said system comprising:. Two time slots are provided for a call transaction, a first and third time slot TN 1TN3 within a direct mode frame, for every communication channel.

It is used by a transmitting mobile station to ramp and linearize its power amplifier PA. In WiMAX, three carrier sets are used to carry preamble.

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Normal burst and synchronization burst contain two independent fields containing modulation bits of the same type. More transparent zones or one larger transparent zone can be accommodated for more direct mode channels to enable more concurrent calls.

A burst is duration of radio carrier modulated with data. Normal burst and synchronization burst have a preamble and a training sequence field. The method of one of claims 6 to 8, further comprising the step of modulating the preamble sequence in such a way that will not cause a false synchronization from standard non-direct mode capable mobile stations.