To code or not to code across time: space-time coding with feedback

To code, or not to code?

In summary, it is also important to remember the hidden rules: 1) Just because there is a code in the manual, it doesn't mean it can be billed to insurance, or that once billed, it will be reimbursed. 2) Just because a code was paid once, doesn't mean it will ever be paid again--or that you get to keep the money! 3) The healthcare provider is responsible for knowing all the rules, but then it i...

To Code or Not to Code

It is well known and surprising that the uncoded transmission of an independent and identically distributed Gaussian source across an additive white Gaussian noise channel is optimal: No amount of sophistication in the coding strategy can ever perform better. What makes uncoded transmission optimal? In this thesis, it is shown that the optimality of uncoded transmission can be understood as the...

To Code or Not to Code, That Is the Question

A New Code for High-Rate Differential Space-Time Coding

In [1], a differential space-time modulation scheme (based on unitary matrices) are presented that can be used without knowledge of the Channel State Information (CSI) at the receiver. This is suitable for mobile communication applications where fading coefficients change rapidly with time. All previous differential space-time codes have been designed to produce full diversity. However, by sacr...

A New Approach to Layered Space-Time Code Design

The block layered space-time codes, with the intent of simultaneously achieving high coding gain and high code rate, have been suggested. These codes are based on the design principles of existing layered space-time codes and space-time block codes. The previously known concept of a layer has been modified to a block layer wherein a block layer has more than one antenna transmitting at the same...