1. (canceled)
2. (canceled)
3. (canceled)
4. The method of claim 12, wherein the nitrite salt is sodium nitrite.
5. The process according to claim 12, wherein the amino compound is dissolved in the formic acid at a temperature of between about \u221210 about 0\xb0 C.
6. (canceled)
7. (canceled)
8. The process according to claim 12, wherein the concentration of the amino compound in the formic acid solution is between about 100 gl and about 200 gl.
9. The process according to claim 12, wherein the concentration of the amino compound in the formic acid solution is between about 120 gl and about 185 gl.
10. The process according to claim 12, wherein the process of producing the polymeric phenazonium compound does not include a step of neutralizing the polymeric phenazonium compound with a base.
11. (canceled)
12. A process for making a polymeric phenazonium compound and using said compound in a plating bath, said process comprising:
(a) dissolving an effective amount of an amino compound in a formic acid solution;
(b) adding a nitrite salt to diazotize the amino compound; and
(c) adding sulfamic acid to neutralize any excess nitrous acid that may be formed in step b);
whereby a polymeric phenazonium compound is produced;
wherein the amino compound comprises an amino compound selected from the group consisting of 2-methyl-3-amino-7-dimethylamino-5-phenyl-phenazonium sulfate, 3-amino-6-methyl-7-dimethylamino-5-phenyl-phenazonium hydrogen sulfate, 2-methyl-3-amino-7-diethylamino-5-phenyl-phenazonium chloride, 3-amno-dimethylamino-5-methyl hydrogen sulfate, 2-methyl-3-amino-7-dimethylamino-phenazonium hydrogen sulfate, 3-amino-7-methlamno-5-phenylphenazonium acetate, 2-phenyl-3-amino-7-ethylamino-5-phenyl-phenazonium chloride, 1,2,6,9-tetramethyl-3-amino-7-diethylamino-5-phenylphenazonium hydrogen sulfate, 2-8-dimethyl-3-amino-7-diethylamino-5-phenyl-phenazonium hydrogen sulfate, 2,8-dimethyl-3-amino-7-diethylamino-5-tolyl-phenazonium chloride, and 2,9-diphenyl-3-amino-6-methyl-7-dimethylamino-5-phenyl-phenazonium hydrogen sulfate;
(d) adding said polymeric phenazonium compound to a plating bath.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of transmitting feedback information in a Multi-Input, Multi-Output (MIMO) system, the method comprising:
generating a Protocol Data Unit (PDU) which includes a Medium Access Channel (MAC) header, an extended subheader group and a payload, wherein the MAC header includes information on whether or not an extended subheader group appears after the MAC header, and wherein the extended subheader group includes a MIMO mode feedback extended subheader; and
transmitting the PDU which includes the MAC header and the MIMO mode feedback extended subheader, wherein the MIMO mode feedback extended subheader includes a request for a change in a transmission antenna type.
2. The method of claim 1, wherein the extended subheader group is an Extended Subheader Format (ESF).
3. The method of claim 1, wherein the extended subheader group appears between the MAC header and the payload.
4. The method of claim 1, wherein the transmission antenna type is antenna grouping information in a closed-loop MIMO system.
5. The method of claim 1, wherein the transmission antenna type is antenna selection information in a closed-loop MIMO system.
6. The method of claim 1, wherein the transmission antenna type is a precoding matrix codebook in a closed-loop MIMO system.
7. The method of claim 1, wherein the transmission antenna type is channel matrix information in a closed-loop MIMO system.
8. The method of claim 1, wherein the MIMO mode feedback extended subheader appears in a first Protocol Data Unit (PDU) transmitted by a mobile station (MS) if the MIMO mode feedback extended subheader is present.