OFDM COMMUNICATION SYSTEM WITH MULTIPLE OFDM SYMBOL SIZES
First Claim
1. A method of transmitting data in an orthogonal frequency division multiplexing (OFDM) communication system from a transmitter device to a receiver device, comprising:
- selecting, based on a payload size of a data packet, a number of first OFDM symbols having a first data carrying capacity and a number of second OFDM symbols having a second data carrying capacity that is different from the first data carrying capacity; and
transmitting the data packet using the selected number of first OFDM symbols and the selected number of second OFDM symbols.
1 Assignment
0 Petitions
Accused Products
Abstract
Techniques to use OFDM symbols of different sizes to achieve greater efficiency for OFDM systems. The system traffic may be arranged into different categories (e.g., control data, user data, and pilot data). For each category, one or more OFDM symbols of the proper sizes may be selected for use based on the expected payload size for the traffic in that category. For example, control data may be transmitted using OFDM symbols of a first size, user data may be transmitted using OFDM symbols of the first size and a second size, and pilot data may be transmitted using OFDM symbols of a third size or the first size. In one exemplary design, a small OFDM symbol is utilized for pilot and for transport channels used to send control data, and a large OFDM symbol and the small OFDM symbol are utilized for transport channels used to send user data.
55 Citations
15 Claims
-
1. A method of transmitting data in an orthogonal frequency division multiplexing (OFDM) communication system from a transmitter device to a receiver device, comprising:
-
selecting, based on a payload size of a data packet, a number of first OFDM symbols having a first data carrying capacity and a number of second OFDM symbols having a second data carrying capacity that is different from the first data carrying capacity; and transmitting the data packet using the selected number of first OFDM symbols and the selected number of second OFDM symbols. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An apparatus for transmitting data in an orthogonal frequency division multiplexing (OFDM) communication system from a transmitter device to a receiver device, comprising:
-
an OFDM modulator configured to select, based on a payload size of a data packet, a number of first OFDM symbols having a first data carrying capacity and a number of second OFDM symbols having a second data carrying capacity that is different from the first data carrying capacity; and at least one transmitter configured to transmit the data packet using the selected number of first OFDM symbols and the selected number of second OFDM symbols. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A program product for transmitting data in an orthogonal frequency division multiplexing (OFDM) communication system from a transmitter device to a receiver device, comprising a memory unit having codes stored thereon for:
-
selecting, based on a payload size of a data packet, a number of first OFDM symbols having a first data carrying capacity and a number of second OFDM symbols having a second data carrying capacity that is different from the first data carrying capacity; and transmitting the data packet using the selected number of first OFDM symbols and the selected number of second OFDM symbols. - View Dependent Claims (12, 13, 14, 15)
-
Specification