Systems and methods for enhancing spectral efficiency in a communication network

1. A method for calibrating rates at which data is transmitted in a communication system, comprising:

transmitting, by a transmitter, to a receiver, a short transmission utilizing a first set of communication parameters comprising first and second communication parameters, said first set of communication parameters being different from a second set of communication parameters used to create stable communication between said transmitter and receiver, said second set of communication parameters comprising first and second communication parameters;

determining that there are substantially no errors associated with reception of the short transmission by the receiver; and

transmitting, by the transmitter, to the receiver, a long transmission utilizing a third set of communication parameters comprising first and second communication parameters, wherein

(i) the first communication parameter of the third set is equal to the first communication parameter of the first set, and

(ii) the second communication parameter of the third set is equal to the second communication parameter of the second set.

2. The method of claim 1 , wherein the first communication parameter for each of the sets of communication parameters is a code rate, and the second communication parameter for each of the sets of communication parameters is a level for a multiple-input multiple-output (MIMO) antenna scheme.

3. The method of claim 1 , wherein the first communication parameter for each of the sets of communication parameters is

(i) a modulation level, or

(ii) a code rate; and

the second communication parameter for each of the sets of communication parameters is selected from a group consisting of:

(i) a level for a multiple-input multiple-output (MIMO) antenna scheme used in transmitting data from the transmitter to the receiver, and

(ii) the inverse of power density.

4. The method of claim 1 , wherein the step of transmitting the long transmission starts before determining that there are substantially no errors associated with reception.

5. A method for calibrating rates at which data is transmitted in a communication system, comprising:

transmitting, by a transmitter, to a receiver, a short transmission using a first set of communication parameters to facilitate a first rate of data transmission that is higher than a second rate of data transmission associated with a second set of communication parameters associated with a previous transmission;

determining that there are substantially no errors associated with reception of the short transmission by the receiver; and

transmitting, by the transmitter, to the receiver, a long transmission of a previous transmission using a third set of communication parameters to facilitate a third rate of data transmission that is

higher than the second rate of data transmission, and

is lower than the first rate of data transmission.

6. The method of claim 5 , wherein the first, second and third sets of communication parameters are entered in a list comprising entries of sets of communication parameters.

7. The method of claim 6 , wherein the sets of communication parameters comprises modulation level, code rate, and antenna usage scheme.

8. The method of claim 7 , wherein at least one set of consecutive entries in said list represent a transition between

an antenna usage scheme that is

(i) single-input single-output (SISO) or

(ii) space time code (STC); and

an antenna usage scheme that is multiple-input multiple-output (MIMO).

9. The method of claim 8 , wherein during said transition at least one of modulation level and code rate is decreased to assist with activation of the multiple-input multiple-output antenna usage scheme.

10. The method of claim 5 , wherein each of the first and the second sets of communication parameters comprises a modulation level.

11. The method of claim 5 , wherein each of the first and the second sets of communication parameters comprises a code rate.

12. The method of claim 5 , wherein each of the first and the second sets of communication parameters comprises an antenna usage scheme.

13. A communication system to calibrate rates at which data is transmitted, comprising:

a receiver; and

a transmitter to:

(i) transmit to the receiver a short transmission using a first set of communication parameters to facilitate a first rate of data transmission that is higher than a second rate of data transmission associated with a second set of communication parameters associated with a previous transmission,

(ii) determine that there are substantially no errors associated with reception of the short transmission by the receiver, and

(iii) transmit to the receiver a long transmission using a third set of communication parameters to facilitate a third rate of data transmission that

is higher than the second rate of data transmission, and

is lower than the first rate of data transmission.

14. The system of claim 13 , wherein the communication system is selected from a group consisting of

(i) WiMAX,

(ii) LTE,

(iii) WiFi, and

(iv) data over cable service interface specification.

15. The system of claim 13 , wherein

the transmitter is a base station, and

the receiver is

a customer premises equipment,

or a subscriber station.

16. The system of claim 13 , wherein the communication system utilizes a transmission scheme selected from a group consisting of

(i) Discrete Multitone Transmission (DMT),

(ii) Digital Subscriber Line (DSL),

(iii) Orthogonal Frequency Division Multiplexing, and

(iv) Orthogonal Frequency-Division Multiple Access.