Hopped delay diversity for multiple antenna transmission
AssigneeNokia Mobile Phones Ltd.
InventorKiran Kuchi
Life of this patent
Estimating the term…
Abstract
A method and apparatus for providing hopped delay diversity for multiple antenna transmissions. In the method and apparatus, an input symbol stream is offset in time by M symbol periods to generate or offset symbol stream. The offset input stream may be offset so as to lead or lag the original input symbol stream. The original input symbol stream is then transmitted on a first set of N antennas and the offset input symbol stream is transmitted on a second set of N antennas, with transmit diversity techniques applied to the transmissions from the first and second set of N antennas.
Claims23
A method for transmitting a signal from a plurality of antennas, said method comprising the steps of:
- receiving a first input symbol stream at a transmitter;
- offsetting said first input symbol stream to generate a second input symbol stream, wherein said second input symbol stream is offset from said first input symbol stream by at least one symbol period;
- performing a first phase shift on said first input symbol stream over a time period to generate a first phase shifted symbol stream;
- and
- transmitting, substantially simultaneously, said first input symbol stream on a first at least one antenna, said first phase shifted symbol stream on a second at least one antenna, and said second input symbol stream on said second at least one antenna.
A method for transmitting a signal from a plurality of antennas, said method comprising the steps of:
- receiving a first input symbol stream at a transmitter;
- offsetting said first input symbol stream to generate a second input symbol stream, wherein said second input symbol stream is offset from said first input symbol stream by at least one symbol period;
- transmitting, substantially simultaneously during a first time period, a first portion of said first input symbol stream on a first at least one antenna selected during said first time period, and a first portion of said second input symbol stream on a second at least one antenna selected during said first time period;
- and
- transmitting, substantially simultaneously during a second period noncongruent with and subsequent to said first time period, a second portion of said first input symbol stream on a first at least one antenna selected during said second time period, and a second portion of said second input symbol stream on a second at least one antenna selected during said second time period, wherein said second portion of said first input symbol stream is subsequent in time to said first portion of said first input symbol stream, and said second portion of said second input symbol stream is subsequent in time to said first portion of said second input symbol stream.
An apparatus for transmitting a signal from a plurality of antennas, said apparatus comprising:
- an input for receiving a first input symbol stream at a transmitter;
- an offset means for offsetting said first input symbol stream to generate a second input symbol stream, wherein said second input symbol stream is offset from said first input symbol stream by at least one symbol period;
- a phase shifter for performing a phase shift on said first input symbol stream over a time period to generate a first phase shifted symbol stream;
- a first and second at least one antenna;
- and
- a transmitter for transmitting, substantially simultaneously, said first input symbol stream on said first at least one antenna, said first phase shifted symbol stream on said second at least one antenna, and said second input symbol stream on said second at least one antenna.
An apparatus for transmitting a signal from a plurality of antennas, said apparatus comprising:
- an input for receiving a first input symbol stream at a transmitter;
- offset means for offsetting said first input symbol stream to generate a second input symbol stream, wherein said second input symbol stream is offset from said first input symbol stream by at least one symbol period;
- plurality of antennas;
- a transmitter for transmitting, substantially simultaneously during a first time period, a first portion of said first input symbol stream on a first at least one antenna selected during said first time period, and a first portion of said second input symbol stream on a second at least one antenna selected during said first time period and transmitting, substantially simultaneously during a second period noncongruent with and subsequent to said first time period, a second portion of said first input symbol stream on a first at least one antenna selected during said second time period, and a second portion of said second input symbol stream on a second at least one antenna selected during said second time period, wherein said second portion of said first input symbol stream is subsequent in time to said first portion of said first input symbol stream, and said second portion of said second input symbol stream is subsequent in time to said first portion of said second input symbol stream.
Dependencies are inferred from the claim text.