US8194776B2

5G,4G

Title

MULTIPLEXING OF REAL TIME SERVICES AND NON-REAL TIME SERVICES FOR OFDM SYSTEMS

Application Number:

US20100704111

Family ID:

35005179

View on Espacenet

Publication Date:

05-06-2012

Application Date:

11-02-2010

Priority Date:

22-03-2000

Current Assignee:

QUALCOMM INC

Publication Country:

US

Declaring Company:

QUALCOMM INC

Abstract  Abstract

Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders a symbol mapping element and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more circuits. Each circuit can be defined to include a number of tones from a number of OFDM symbols a number of tones from a single OFDM symbol all tones from one or more OFDM symbols or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g. active speech) and low rate data (e.g. silence periods).

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