Voice messaging system and method making efficient use of orthogonal modulation components
AssigneeMotorola, Inc.
InventorsKazimierz Siwiak, Sunil Satyamurti, William Joseph Kuznicki
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Abstract
A modulation scheme (600) useful in a voice paging system in which both of two orthogonal modulation components (500 and 510) are used to carry two halves of a single voice message destined for a receiver, or two separate voice messages for a receiver. The single voice message is transmitted in half the time.
Claims19
A method for transmitting a message to a receiver comprising steps of:
- temporally splitting the message into first and second message portions which are time contiguous portions of the message;
- orthogonally modulating first and second orthogonal components with the first and second message portions, respectively, to generate first and second orthogonally modulated components;
- and
- simultaneously transmitting the first and second orthogonally modulated components.
A method for transmitting first and second portions of a message to an addressable receiver comprising steps of:
- orthogonally modulating first and second orthogonal components with first and second portions of the message, respectively, to generate first and second orthogonally modulated components, the first and second message portions being time contiguous portions of the message;
- and
- simultaneously transmitting the first and second orthogonally modulated components in a protocol which includes address information corresponding to an address of an addressable receiver and synchronization information suitable for triggering the addressable receiver to enter a mode suitable for simultaneously demodulating the first and second orthogonally modulated components at a particular instant of time in accordance with the synchronization information.
A method for receiving a transmitted signal comprising first and second orthogonally modulated components comprising steps of:
- demodulating the transmitted signal to obtain first and second message portions from the first and second orthogonally modulated components, respectively, the first and second message portions being time contiguous message portions of a single message;
- and
- temporally sequencing the first and second message portions to combine them in time in order to generate a single message comprised of the first and second message portions.
Dependencies are inferred from the claim text.