Multiple-antenna transmission and reception techniques can improve both the reliability and efficiency of digital wireless systems. Due to the size, cost, and complexity constraints, it is in general challenging to implement multiple antennas at the mobile terminals. Meanwhile, considering the antennas at different mobile terminals together, we can create a multiple-antenna scenario, even if each terminal only has a single antenna. In this chapter, we introduce several advanced wireless transmission technologies that explore in one way or another multiple antennas at different mobile terminals to achieve diversity gain as well as multiplexing gain. In particular, we will investigate multiuser diversity transmission, cooperative diversity transmission, and multiuser multiple-input-multiple-output (MIMO) transmission technologies. Our study of these advanced technologies will serve as the applications of the general digital wireless transmission over fading channel framework that we established in the previous chapters. Due to space limitation, these discussions will be by no means comprehensive. Interested readers can refer to related literature for further details.

Chapter Contents:

• 11.1 Multiuser diversity transmission
• 11.1.1 Scheduling strategies
• 11.1.2 Implementation issues
• 11.2 Cooperative relay transmission
• 11.2.1 Amplify-and-forward relaying
• 11.2.2 Decode-and-forward relaying
• 11.2.3 Cooperative diversity
• 11.3 Multiuser MIMO transmission
• 11.3.1 Linear zero forcing beamforming
• 11.3.2 Spatial multiplexing with random beamforming
• 11.4 Further readings
• Problems
• Bibliography

Inspec keywords: diversity reception; mobile radio; radio reception; telecommunication network reliability; cooperative communication; antenna arrays; multiplexing; fading channels; communication complexity

Other keywords: multiplexing gain; fading channel framework; diversity gain; digital wireless system; MIMO transmission technology; advanced digital wireless transmission technology; mobile terminal; multiuser multiple-input-multiple-output transmission technology; complexity constraint; cooperative diversity transmission; single antenna; reliability; multiuser diversity transmission; reception technique; multiple-antenna transmission

Subjects: Antenna arrays; Communication switching; Mobile radio systems; Reliability