Transmitter and transmitting method increasing the flexibility of code assignment

Wireless transmission system, comprising:

• means for spreading each data symbol with a respective spreading code,
• wherein the spreading codes are mutually orthogonal,
• means for scrambling each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes, and
• means for transmitting said spread and scrambled symbols,
• wherein the means for scrambling are provided with a plurality of different scrambling codes which can be used simultaneously within the same link so that a maximum data rate is increased, and
• wherein a subset of scrambling codes is respectively allocated to a cell of the transmission system.

Method for the transmission of data symbols over a communication channel, comprising the following steps:

• spreading each data symbol with a respective spreading code,
• wherein the spreading codes are mutually orthogonal,
• scrambling each spread symbol with a respective scrambling code, the scrambling codes respectively having the same length as the spreading codes, and
• transmitting said spread and scrambled symbols,
• wherein the scrambling step provides a plurality of different scrambling codes which can be used simultaneously within the same link so that a maximum data rate is increased.

A method for the transmission of data symbols over a communication channel, comprising the following steps:

• spreading each data symbol with a respective spreading code,
• wherein the spreading codes are mutually orthogonal,
• scrambling each spread symbol with a respective scrambling code, and
• transmitting the spread and scrambled symbols,
• wherein for the step of scrambling a plurality of different scrambling codes is provided so that a maximum data rate is increased.

A wireless transmission system, comprising a plurality of user terminals in one cell and respectively connected with an uplink transmission to the same base station,

• wherein each of the user terminals comprises:
• means for spreading data symbols to be transmitted with a respective spreading code,
• wherein the spreading codes are mutually orthogonal, and
• means for scrambling each spread symbol with a respective scrambling code, and
• wherein different user terminals in the same cell use different scrambling codes so that a maximum data rate is increased.

A transmitter for communicating data symbols over a communication channel comprising a plurality of sub-channels, the transmitter comprising:

• means for spreading the data symbols of each sub-channel with a respective spreading code,
• wherein the spreading codes are mutually orthogonal,
• means for scrambling the spread symbols of each sub-channel with a scrambling code, and
• means for the transmission of the spread and scrambled symbols of each sub-channel,
• wherein said means for scrambling are designed to scramble different sub-channels with different scrambling codes so that a maximum data rate is increased.

Method for the transmission of data symbols over a communication channel comprising a plurality of sub-channels, comprising the following steps:

• spreading the data symbols of each sub-channel with a respective spreading code,
• wherein the spreading codes are mutually orthogonal,
• scrambling the spread symbols of each sub-channel with a respective scrambling code,
• wherein said sub-channels are scrambled with different scrambling codes so that a maximum data rate is increased, and
• transmitting the spread and scrambled symbols of each sub-channel.